American Gemstone

The Only Choice for Serious Businesses

Jewelry Manufacturers for the World's Top Brands


We are an American company (American Gemstone Authority, LLC) with our manufacturing carried out at our subsidiary jewelry factory in Bangkok, Thailand (American Gemstone LTD)

We are a lean, technology driven organization with a focus on leveraging technology to achieve ultra rapid delivery and very fine quality. Through our production capabilities, our clients are rapidly becoming lean organizations, minimizing their stock and making their deliveries ahead of schedule.

Our clients range from established, very well known, international jewelry brands, to jewelry wholesalers, to jewelers, and boutiques across North America, Europe, Asia, and Australia. We can help you take your brand into the digital age.

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Your Search For A Manufacturer is Over

Why Private Labels Worldwide are Shifting Their Manufacturing to American Gemstone

We're In A League Of Our Own

We offer complete jewelry manufacturing solutions for businesses looking for a faster and more cost effective way to go about making their fine jewelry productions.

We are an American company with fully owned manufacturing in Bangkok, Thailand. We do all of our work in house, from casting through plating, allowing for strict QC procedures at every stage of the manufacturing process.

  • Ultra Fast Delivery- Our 2016 order turnaround time averaged at 16 days.
  • Top 10 Brand Quality – Products we manufacturer can be found at department stores and fine jewelry outlets worldwide. To name but a few..
Net-A-Porter Harvery Nichols
  Saks Fifth Avenue ISetan
  Browns Colette
  • Fastest time to market in the Industry – Product Development, Manufacturing, & jewelry Production.
  • Free Trade Agreement Registered Exporter so may send items duty free to jewelry wholesalers in Australia, Switzerland, Netherlands, Norway, Russia, Canada, and Japan.
  • GSP Tax Preference To America, in many cases reduced or exempt import duties on silver and gold jewelry.

We Do Everything In-House

We are a full service jewelry factory. We provide complete custom jewelry manufacturing services from jewelry design right through to large scale productions and can accommodate anything in-between.

Setters Making Jewelry


Manufacturing Jewelry With Us

Jewelry Manufacturing Procedures

Sign Up: Start by making a user account (if you do not yet have one).

Custom project submission: Once logged in; select the link that says “Submit Your Jewelry Design” under the “Quotation” menu.

Jewelry designs must be submitted to us through our manufacturer web portal. All designs submitted in this manner by our business clients are completely confidential, and will never be reproduced without your explicit permission. Through our online system we are able to streamline our communication with you through your user account.

Our expert design team are available to help guide you through the process of making your jewelry designs, by transforming your sketches, pictures, or ideas into 3 dimensional CAD files for review before you commence making your jewelry samples.

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Wholesale Pricing

Our invoices are generated in such a way as to be as transparent as possible on our pricing. This allows you to get a feel for how much projects will cost before you have even begun to create them. As we are primarily a production company all of our unit prices are geared towards production orders. First prototypes created of a style will also enjoy our regular production prices with no surcharges added outside of development fees for creation of masters, molds, and designs.

When submitting jewelry designs inside your user account, you will see pricing breakdowns of all materials used in your jewelry product. Gold and silver is priced out per gram, and gemstones are generally priced out per piece. For advanced users, our web portal allows you to select your own estimates of material usage when submitting a new jewelry design for quotation. This allows you to receive instant ballpark estimates for new jewelry creations, and further allows you to tailor your product to a specific target budget prior to submission for review.

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Payment Procedures

Will first manufacture a silver prototype of your jewelry design before proceeding with any productions or gold samples. For more information please visit our Jewelry Prototyping section. We require all jewelry prototypes to be paid up front in full.

Once a jewelry prototype model has been accepted you will be free to make production orders at your discretion. Goods will be delivered FOB to your carrier of choice.

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Submitting A Design For Quotation

Before contacting us, we strongly recommend that you visit our Frequently Asked Questions page. Answers to most common queries can be found there.

When you’re ready to proceed with a quotation, simply click on the Free Quotation button above to get started making jewelry with us.


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Jewelry manufacturing Tools, Tips and Information

Jewelers Forum

Question: How to prepare designs for production? The first step in developing a commercial line, like many things, is clarity of vision. It’s very important to know exactly what you want to produce and to be able to communicate this vision efficiently. To accomplish this, you will need one of four things: A master, a sample, a picture, or a sketch.

Metal Market Price

The following gold and silver prices are quoted in Troy Ounces and are pulled from the New York Mercantile Exchange, the London Bullion Market, and the Tokyo Commodity Exchange by Kitco Metals Inc.

Diamond Calculator

The following table can calculate a piece of jewelry’s approximate diamond use. Simply fill out the number diamonds of each size used in the piece of jewelry and the total approximate diamond weight used in the piece.

Metal Conversion Table

These conversion tables can approximate the weight of a finished piece of jewelry from a piece of jewelers wax. Simply enter the weight of the wax in the box titled “Your Value”, and the table will automatically calculate

Jewelry Appraiser

The below project estimator will give you a free jewelry appraisal of a piece’s approximate retail price. It can quickly calculate approximate retail cost of a piece of jewelry if you have a good idea of it’s components


Frequently Asked Questions


Grade AAA – Consistent Brighter colors. Diamond cut. Loupe clean up to VS quality.
Grade AA – Consistent Lighter colors. Diamond cut. Eye clean up to SI-2 quality.
Grade A – Inconsistent mixed colors. Minor inclusions up to I-1 quality.

We only accept to stock and use client gemstones from established businesses. Unfortunately if you are a startup you will need to choose from the large selection of gemstones that we regularly stock.

If you are an established business, we are happy to receive your stock, however be aware of the following;

  • While we will do our best to protect your gemstones and segregate your gemstones from our own stocks, we take no liability for clients gemstones while in our possession.
  • You will be responsible for any import duties accrued on receiving these stones. Please follow our shipping instructions to minimize these. In our experience importing gemstones, if the above instructions are followed, it has not been a problem. Generally gemstones are an import tax free item, leaving only the possibility of a 7% VAT on goods.
  • There will be additional setting charges for using client provided stones. This covers the additional administration hassle of having to maintain segregated gemstone stocks and inventories. These additional fees can be evaluated when you upload a product for quotation by notating to our staff the types and sizes of gemstones you intend to provide by adding a product note.

Natural Gemstones;

  • We do a lot of work in small calibrated sizes and commonly work with the following in millimeter size stones:
    • Callibrated (Under 5mm):
      • White: Diamond, Sapphire, Topaz
      • Black: Diamond, Sapphire
      • Yellow: Citrine
      • Purple: Amethyst, Iolite
      • Green: Peridot, Garnet
      • Red: Ruby, Garnet
      • Pink: Ruby, Sapphire
      • Blue: Sapphire, Topaz
      • For clients that are established businesses we are willing to source other options, however sourcing fees of $59 will apply.
    • Larger sizes, (over 5mm) in production pieces, we’re mostly limited to the following:
      • White: Topaz
      • Black: Spinal, Onyx
      • Yellow: Citrine
      • Purple: Amethyst
      • Red: Garnet
      • Blue: Topaz
      • For clients that are established businesses we are willing to source other options, however sourcing fees of $59 will apply.
  • Inlays: we do some inlay work and have available the following gemstone varieties for this;
    • Onyx
    • Tigers Eye
    • Labradorite
    • Lapis Lazuli
    • Malachite
    • Turquoise
    • Fluorite
  • Center stones for use in unique pieces can be sourced on request.

Synthetic Stones; We also work in CZ both white and fancy as well as crystal for colors that are not available in CZ.


E-Coating is typically applied on top of flash plantings to improve durability. Since we only offer durable plating solutions that in and of themselves will have years of wear time, we do not offer E-Coating. We advise our clients to stick to real vermeil plating solutions as e-coating can lead to all sorts of post production problems. Electrophoretic coatings are considerably thicker than other plantings which lead to chain, clasp, and surface consistency issues. When e-coatings do wear, they tend to go in an unattractive manner, making your piece of jewelry look plastic and fake. On top of that, they are reactive to a wide array of solvents and jewelry cleaners which can lead to product returns form your clients down the road.

We have a state of the art plating set up and not only offer a wide range of plating options, but also offer a 2 year guaranty on our plating. As such, all of our gold plating is thick micron vermeil gold plating. All of our plantings are nickel free and REACH compliant.

  1. 18K Yellow Gold Vermeil
  2. 18K Pink Gold Vermeil
  3. White Rhodium
  4. Black Rhodium – We actually use Black Rhodium, not Black Rhutanium as many jewelers offer to save cost as the Black Rhutanium has all sorts of durability and post production issues.

We also offer silver Oxidization (Antiquing) as a finishing. Please note that Oxidization cannot be used on a piece together with any other plating option. This is because oxidization is not actually plating, it is a chemical reaction with the metal. Oxidization should also only be done in groves and recessed areas, and generally not on raised areas or areas that come in contact with the skin. This is because unlike plating, oxidization can easily be polished off by friction and is not a durable finishing method if applied to raised areas.


All quotations are generated online. You have to create an account and submit your product to receive a quotation from us. When you create a product in your user account, you will see a breakdown of all the components and prices charged for them attached to the product along with labor. We try to make pricing as transparent as possible.

  • Pricing for precious metals used in your jewelry is inclusive of all wastage. This means that you only pay for the actual raw material inside your piece of jewelry. Our precious metals prices are updated regularly. Many manufactures will hide their costs by applying a wastage percent on top of material usage.

As a fine jewelry manufacturer we work in silver, gold, and platinum, and do not accept work in non-precious metals.

Unless you predict very high order volumes, than generally no. It would be very difficult for us to maintain separate raw material stocks as we would have to stock casting trees in each alloy adequate to meet projected order volumes. We would also have to increase our recycling frequency which would in turn increase our waste.

18K Gold:  Yellow, White, Pink

14K Gold: Yellow, White, Pink

10K Gold: Yellow, White

9K Gold: Yellow, White (Orders must be over 200 grams per color)

Silver 925 (Ultra Hard – DeOx): Our DeOx alloy tarnishes slower than Silver 925 alloyed with copper. It is a proprietary alloy, does not contain Nickel or Cadmium, and is fully REACH compliant.

  • We produce jewelry for a number of well-known international jewelry brands, including Top 10 Brands. Products that we manufacture for clients can be found in many department store chains worldwide. We have clients inside the US, as well as all over Europe, Switzerland, Australia, Canada, and Asia.
  • Our intellectual property agreements require that we do not disclose specific information about our clients without requesting their permission to do so on a case by case basis. As such, references can be provided, but we will need some notice to receive authorization from individual clients first.
  • To do this, you will need to use our Contact Form authorizing us to disclose your identity to a reference. We will then request a letter of recommendation from a brand that we feel appropriate to the situation.
  • After registration of a business account with us, you will automatically be instructed to sign and upload a copy of our intellectual property and manufacturing agreements before you are able to proceed with your first order.
  • Our IP agreements are very thorough and are designed to protect you. Any improvements to jewelry designs, modifications of jewelry designs, or new jewelry designs developed for you are automatically your property, as are your masters, molds, and any jewelry components that we manufacture for you in the course of producing your designs.
  • New product samples are usually shipped in under 3 weeks.
  • Production orders are usually shipped in under 3 weeks.
  • Our average order turnaround time for 2016 was 16 days, but some products can take longer due to specific component requirements.
  • Due to national holidays, orders placed close to the Thai New Year (Middle of April) and at the end of December will be subject to a week of additional production time.

We will never knowingly violate trademark or copyright law. You, the client, must certify to us that you are the owner of any intellectual property that you have us manufacture. That said, legally you are allowed to draw inspiration from other designers or replicate designs that are public domain. In short, you are allowed to draw inspiration from other works to create your own; this is normal, and part of the artistic process, but you are not allowed to exactly copy other copyrighted works, or to ask us to put a trademark or manufacturers mark that you do not own onto your jewelry.

Copyright law, especially when applied to jewelry designs can be very complicated. If you are not sure whether you have the right to manufacture something, consult a IP lawyer before beginning. Please note that in our manufacturing agreements, you will agree to the following:

“Purchaser certifies that all intellectual property disclosed to Manufacturer in connection with this agreement is Purchaser’s original works, or that Purchaser has legal rights to reproduce said intellectual property and has authority to authorize Manufacturer to reproduce said intellectual property on Purchaser’s behalf. Purchaser assumes all legal liability for any third party claims resulting from Manufacturer’s reproduction of Purchaser’s intellectual property should they arise. In the event that Manufacturer is required to respond to a third party or law enforcement subpoena or court order that is related to Purchaser’s use of the Site or Products, Manufacturer may, in Manufacturer’s sole discretion, require Purchaser to reimburse Manufacturer for Manufacturer’s reasonable expenses associated with complying with such subpoena or order.”

  • When provided with a picture or a hand drawn design, we generally strongly recommend proceeding with a CAD design prior to commencement. This allows us to render a 3D model and make sure there will be no production issues with the design prior to commencement. It also allows us to estimate weights and stone counts much more accurately than a ballpark guess, which means you will have a much better idea of the final price of the product.
  • If a client is insistent on proceeding without a CAD, we can work directly from pictures provided they contain measurements of all aspects of the jewelry; though we will need to be able to ascertain gemstone counts and sizes. Just be aware that without a CAD you are authorizing a large amount of discretion to the jeweler who will be preparing the wax. Also quotations based on images may not be very accurate weight-wise so there may be substantial material discrepancy on product completion (IE we estimate 4 grams and the product is 6 grams). Where discrepancies are substantial the difference will either be billed additional or refunded on product completion.

All of our jewelry is 100% cadmium free and REACH compliant. We do a lot of business in the EU.

  • There is no minimum quantity orders with us. It is one of the aspects that makes our organization great. Our ordering systems allow for you to practice Just In Time inventory systems and place your orders with us according to your distributors orders to you. Our larger clients sometimes place 10 – 50 orders per day according to their distributions. Orders can contain anywhere from one piece to many thousands of pieces.
  • To price your products you will need to create an account by clicking on the ‘Register’ button on the top of the page or the ‘Submit Design’ button. The registration process only takes about 30 seconds. All quotations are generated online. You have to create an account and submit your product to receive a quotation from us.
  • When you sign up for a customer account with American gemstone you will automatically be assigned to a pricing group based on a number criteria which will be researched by a staff at the time of your account creation.
  • Because designs are all made of precious materials, prices are completely dependent on component usage. You’ll have a chance to estimate these at the time of product submission, but don’t worry our staff will review your product and update everything to realistic values within 24 hours. Once you are logged in, you will be able to submit designs for quotation through the custom product builder which can be accessed by clicking on the Submit Design button. You can also use the Jewelry Appraiser link to see approximate production prices for your products based on various component selections. Our gold and silver rates are updated weekly so your products prices will fluctuate as the markets do.
  • If you consistently order high volumes your account may be further upgraded.