- AJS Gems - Importer and exporter of rough and polished gemstones for the gem industry, gem cutters, jewelers, lapidaries and collectors.
- Algemco Hassam Ventures - Faceted gemstones and facet rough from Nigeria.
- All That Glitters - Features a wide range of gemstones, crystals, and some jewelry.
- Allied Rough & Cut Gems - Australia based supplier of facet rough and loose faceted gemstones. Origin of gemstones is mainly Afghanistan, Pakistan, Thailand and Burma.
- Angara - Loose sapphires, rubies, emeralds, tanzanites, aquamarines and some diamonds. Build your own functionality for finished jewelry.
- ARC International - Pakistan and Afghanistan-sourced faceted gemstones, facet and cabbing rough. Features peridot, afghan tourmaline, kunzite, sapphires and lapis lazuli. Some Afghan finished jewelry.
- Astro Gallery of Gems - Uncommonly fine specimen collections of minerals, rocks, crystals and unusual gemstone formations.
- Astrological Gem - "Jyotish" gemstones - loose untreated natural faceted and cabochon gemstones for Vedic Astrology & Ayurveda uses. Notable information about Vedic usage, links to sourcing and mining articles.
- Aurora Ammolite Mine - Unique Ammolite gem site. Pictorial info on history, origin, properties, and mining of these fossilized ammonites. Finished stones for purchase.
- AZ Emerald - Colombian emerald specialist based in Arizona. Extensive information about Colombian emeralds, best color, natural versus treated stones.
- B.G.A. Gems - European importer-exporter of faceted and cabochon colored gemstones. Prices in Euros.
- Beaut Gems - Australian supplier of faceted colored loose gemstones, each with certificate. Useful information in each gemstone category.
- Buena Vista Gem Works - Cutter and retailer of Colorado-sourced gemstones: Mt. Antero aquamarine, peridot, rhodocrosite, and topaz. Collector and rare gems section. Some jewelry.
- Carat-Online - Austrian supplier of faceted diamonds and colored gemstones. Prices in Euros.
- Champon Pearls - Tahitian pearl farmer supplying individual pearls, sets, and small lots. Photographs of farming operation. Prices in Euros.
- CN Thai and Sons Company Limited - Offers diamonds, sapphires and ruby, as well as jewelry.
- Creative Gems & Jewelry - Thai manufacturer and exporter with broad inventory of colored gemstones loose and in small lots. Finished jewelry and some rough available.
- Crystal Vine - UK supplier of finished Ethiopian opals, specimen minerals and crystals, and some faceted gems. Mineral collections, gem fair dates, useful rockhound links. US, UK and Euro pricing.
- D and J Rare Gems Ltd - Fine gemstones loose and in small lots. Rare faceted gems for collectors, gem show schedule.
- Darbellay Company - Extensive inventory faceted and cabochon fine gemstones, collector's minerals, designer's fancy shapes. loose stones,sets, and small lots.
- Day Gems - Bangkok-based cutter and fabricator specializing in natural, untreated Mogok rubies, Ceylon sapphires, and jadeite.
- Embassy Emeralds - Loose Colombian emeralds and custom emerald jewelry.
- Erdenesgems - Faceted, cabochon and carved precious and semi-precious gemstones from Thailand. Singles, sets, lots and calibrated.
- EuroGem - German supplier offering loose certified diamonds and colored gemstones. Bilingual English and German website. Prices in Euros.
- Facet Shoppe - Rough and cut gems, gemstone optics, faceting information for beginners, computer faceting programs, Faceter's Digest.
- Flecklin Trading - Wide inventory of gemstones, natural lab-created and rough, Australian opals, tahitian pearls. Related gem information.
- Galarneau's Gems - Custom faceted gemstones and unusual cabochons plus 14k and sterling silver jewelry, bead and pearl necklaces.
- Gallery of Gemstones - Faceted loose gemstones, faceting rough, and finished fine jewelry.
- Gem Country USA - Offers a wide variety of cut gemstones both faceted and cabochons.
- Gemcal - Supplier of sapphires and spinel directly from Thailand.
- Gemcolor - Supplies gems for private purchase and jewelry designers. Diamonds, ruby, sapphires, emeralds and tanzanite.
- GemData - Faceted colored gemstones, SoLux Daylight lighting and the Gem, Mineral and annual Jewelry Show Calendar.
- Gemhunters - Mine-owners and cutters of Australian gemstones. Supplies sapphires, zircons, worldwide as faceted gems or as unfinished rough.
- Gems by Genovese - Drusy and cabochon offerings of unusual material: dendritic, gold, copper, titanium or platinum coated drusy, cocoxinite, coyomito agate, dendritic shale. Carvings and custom cutting service.
- Gems of East Africa - Gemstones from East Africa, Arusha, and Tanzaniza. Rough and faceted stones. Wholesale pricing said to be available.
- GemsAmerica.com - Importer and retailer of faceted gemstones, freshwater, akoya and tahitian pearls; and jewelry in coral, jade and turquoise.
- GemsBiz - Indian supplier of faceted loose gemstones both natural and lab-created, gemstone beads, and cubic zirconium. Extensive selection of fancy cut gemstones.
- Gemstone World - Fine facet rough and cut gemstones from around the world. Collector's gems, free Gem and Lapidary newsletter.
- GemSuite.com - Retails most gemstone varieties. Also includes general information about the gemstones.
- GemYes.com - Faceted colored gemstones and jewelry. Informative collection of unusual gemstone inclusions and anomalies.
- Geolite - Natural and synthetic gemstones including aquamarines, morganite, rhodolite garnets, amethysts, citrines, blue topaz, tourmalines, apatite, and cats eyes.
- Glyptic Illusions - Gemstone carvings for fine jewelry.
- Gram Faceting - Authoritative site for faceters. Faceted loose gemstones and facet rough; faceting machinery, supplies, equipment reviews, articles, pictorial guides, technical details, book reviews,and design how-to's.
- Harmon's - Montana agate cabochons, carvings, polished slabs, jewelry and rough.
- Joseph Gad & Company - Manufacturer of important loose faceted Columbian emeralds and emerald jewelry.
- Jyotish Gem - Importer of natural untreated sapphires from Sri Lanka. Some loose pearls, rubies, emeralds, and a limited diamond selection.
- Kalat Fine Minerals - Minerals, fossils, jewelry, meteorites for sale to dealers, collectors and jewelry makers. Handmade jewelry from crystals, tektites and meteorites.
- Lambert Industries Ltd - Gemcutter and loose gemstone retailer of precious and semi-precious faceted and cabochon gems.
- Lyssa Gem - Offering faceted and cabochon gemstones such as garnets, aquamarine, lapis lazuli, amethysts, tourmaline and topaz.
- M and M Gems - Manufacturers and exporters of colored gemstones. Calibrated emeralds is a specialty.
- Mani Ratnam Company - Indian retailer of various precious and semi-precious gemstones and beads.
- Mexico Gemstones - Mexican Fire Opal and Fire Agate specialist, both finished and rough, Chiapas Amber, and native mineral specimens.
- Modern Stone Age - Hand cut faceted, cabochon and designer gemstones.
- MystiCrystals - Faceted gemstone jewelry, gem 'trees', and custom faceting.
- National Gemstone - Dealers in GIA fancy colored diamonds and AGL colored gemstones to collectors and investors.
- OBAI Pearl Jewelry Trade Company - South Sea, Tahitian, Akoya, Biwa, and freshwater loose pearls and strands. Some silver findings, gemstone strands.
- Origem - Boulder opals, carved opals and other gemstones, related jewelry items.
- Ozark Rock Exchange - Crystals, mineral specimens. Geology and history of gemstones ezine.
- PehnecGems - Specializing in Cubic Zirconia and other lab-created gemstones.
- Perlas Del Mar De Cortez - Unique Mexican pearl farm in the Sea of Cortez. Links to exclusive distributors, designers featuring the gem, and a very limited number of retailers. Extensive gallery on pearl biology.
- Pioneer Gem Corporation - Featuring loose, unset gemstones with mounting services available.
- Pretty Rock Productions - Cabochon and faceted gemstones,rough, gemology tools and custom jewelry. Slab sawing service.
- R. Schultz Gems - Brazilian loose colored gemstones and custom jewelry.
- Robert Bentley Company - Art jewel or designer gemstone strands. Unusual materials, shapes, and surfaces: random facets, textures, hammered, and etched stones.
- Rodrigue and Son - Ceylon sapphire, Burma ruby, Colombian emeralds and custom jewelry.
- S and S Gems and Jewelry - Offers diamonds, cabochons, and faceted gems, with photographs and specifications of each item.
- Saint Hart Gallery - Offers important, possibly unique, gemstones, gemstone carvings, and objet d'art.
- Seed Beauty - Supplier of gemstone beads and jewelry findings.
- Simply Sapphires - Specialist in loose sapphires. Some tanzanite and rubies also available.
- Skye's Gems - Utah West Desert-sourced gemstones and rough: Tiffany stone, red beryl, bixbite, chrysocolla. Cabochons and some jewelry available.
- Star Shine Ltd. - Bangkok-based manufacturer of faceted loose colored gemstones. Specialist in unusual chatoyant gems such as star sapphire, star ruby, star alexandrite, star chrysoberyl and others.
- Starzz Diamonds - Specializing in uncut natural rough stones, in a variety of colors and shapes, offered loose and in settings.
- Steve Walters - Contemporary gemstone carvings for jewelry designers.
- SWD Import Export Co.,Ltd. - Offering precious and semi-precious gemstones, available in a variety of shapes. Located in Thailand.
- Synthetic Gems - Supplier of synthetic lab grown faceted and rough cubic zirconia, spinel and corundum. Some natural faceted stones.
- The Gem Quarry - Gem rocks and clusters for decorative purposes. Clear quartz clusters, amethyst, colored quartz, fluorite, other crystal for garden use.
- The Gem Zone - Loose faceted Tanzanite gemstones and jewelry. Mining information and history of Tanzanite.
- The Gemcutter - Cutter of rough or damaged gemstones. Faceting, goldsmithing, and gem-setting school.
- The Gemstone Connection - Extensive range of loose diamonds and colored stones in standard shapes and calibrated sizes, pearls, and opals. Best for goldsmiths, jewelers, designers, collectors due to limited photography.
- The Natural Sapphire Company - Specialist in untreated faceted loose sapphires and jewelry made with untreated gems.
- The Pink Emerald Company - Specializing in colored emeralds, some investment-grade colored gemstones, and carved gemstone objet d'art.
- The Star Ruby Shop - Natural loose star rubies, faceted and cabochon rubies and some jewellery.
- TowerCrystals.com - Offering wirewrapped jewelry, crystals and mineral specimens, moldavite-tektites, and meteorites.
- Tradeshop, Inc. - Loose diamonds, extensive jewelry, considerable gemology information.
- Velasco Fire Agates - Lapidarist only of fire agates mined near Calvillo, Aguascalientes, Mexico. Finished cabochons, rough, and fire agate jewelry.
- W Scott Forrest Gemstones - Loose diamonds and colored gemstones direct from the cutter. Benitoite specialist.
- Wild Fish Gems LLC - Natural unenhanced loose colored gemstones. Important articles re judging gems on photos (online), enhancement scams, gem treatments. Link to 'Natural Unheated Ruby' site.
- ZBV Enterprises - Designer shapes loose cabochons, slabs, and rough from uncommon materials.
