We have a large library of gemstone articles and reference material, suitable for all levels. Here are links to some of our most popular information pages:
The Basics
Advanced Topics
AJS Gems Newsletter
Gemstone Articles
Custom Jewelry
Madeira Citrine
Chrysoprase Gems
Very Rare Grandidierite
Ring Size Chart
Guide to Green Gems
Mozambique Ruby
Iolite Gemstones
Fancy Color Tanzanite
Color Change Diaspore
Yellow or Golden Beryl
Spinel Gemstone Prices
An Exceptional 2.21 ct Demantoid
Type A Jade from Burma
Canary Yellow Tourmaline
Refractive Index Chart
Thai Gemstones
Rare Gems
Sapphire Rings
An Amazing Paraiba Tourmaline
Rough and Cut Gemstones
Umbalite Garnet
Raspberry Rhodolite Garnet
Emerald Enhancements
A Perfect 4 ct Tsavorite Garnet
Fluorite Gems and Minerals
A Rare Vivid Mandarin Garnet
Rare Serendibite
Danburite Gems
Trillion Cut Gems
Burma Sanctions on Ruby & Jade
Natural Alexandrite
Tourmaline Gems for Sale
Chrysoberyl Gem Family
Fine Tsavorite Garnet
Padparadscha Sapphire
Buying Gems in Thailand
Concave Cuts
Rare Imperial Topaz
Untreated Gems
Gemstone Treatments
Blue Sapphire Prices
Rare Gem Prices
Size and Weight
Buying Gems in Bangkok
Fracture-Filled Ruby
Rare Garnet Prices
Precious and Semiprecious
Price per Carat
Africa Gems
Zircon Gems
Gemstone Gallery
Star Gemstones
Tanzanite Grading
Ceylon Sapphire
Platinum Jewelry
Madeira Citrine
Chrysoprase Gems
Very Rare Grandidierite
Ring Size Chart
Guide to Green Gems
Mozambique Ruby
Iolite Gemstones
Fancy Color Tanzanite
Color Change Diaspore
Yellow or Golden Beryl
Spinel Gemstone Prices
An Exceptional 2.21 ct Demantoid
Type A Jade from Burma
Canary Yellow Tourmaline
Refractive Index Chart
Thai Gemstones
Rare Gems
Sapphire Rings
An Amazing Paraiba Tourmaline
Rough and Cut Gemstones
Umbalite Garnet
Raspberry Rhodolite Garnet
Emerald Enhancements
A Perfect 4 ct Tsavorite Garnet
Fluorite Gems and Minerals
A Rare Vivid Mandarin Garnet
Rare Serendibite
Danburite Gems
Trillion Cut Gems
Burma Sanctions on Ruby & Jade
Natural Alexandrite
Tourmaline Gems for Sale
Chrysoberyl Gem Family
Fine Tsavorite Garnet
Padparadscha Sapphire
Buying Gems in Thailand
Concave Cuts
Rare Imperial Topaz
Untreated Gems
Gemstone Treatments
Blue Sapphire Prices
Rare Gem Prices
Size and Weight
Buying Gems in Bangkok
Fracture-Filled Ruby
Rare Garnet Prices
Precious and Semiprecious
Price per Carat
Africa Gems
Zircon Gems
Gemstone Gallery
Star Gemstones
Tanzanite Grading
Ceylon Sapphire
Platinum Jewelry
Customer Reviews
Gem Silica exceeds my expectation
Dear Ron, I received the gem silica today and it exceeds my expectation. Its beautiful greenish blue color combined with the translucency makes it look like a piece of ocean. I really love it. Thank you for your help and the fast shipping. Best regards,
-- SL, South Korea, Feb 2021
Beautiful Sphene!
Hi Ron, I got it [6.17 ct Sphene] yesterday and it's beautiful! Thanks so much for following up.
-- CF, USA, Jan 2021
Your reputation precedes you
Thank you so much Ron! Your reputation precedes you which is why after a very long internet search, I decided to use AJS Gems for my purchase. I can't wait to see them [8.85 ct Amethyst pair] and design something for my beautiful girlfriend. Sincerely,
-- TS, USA, Dec 2020
Beautiful Chrysoprase
Hello! The stone was received [11.92 ct Chrysoprase], very beautiful !!!! Thank you very much!!!
-- VK, Russia, Dec 2020
Beautiful Aquamarine, happy with its quality!
Dear Ron, Thank you for following up the order, I have already collected the registered post from the post office. The [5.42 ct Santa Maria] Aquamarine is beautiful and I am happy with its quality, thx! Regards,
-- CP, Hong Kong, Dec 2020
