GeezerVison is showing www.gemdat.org — Gemstone Database - Gems and gemology, Gem Localities, Photos and Data

12th Nov 2026

gemdat.org - the gemstone and gemology information website

Current statistics: 624 gem names. 526 gemstone data pages. 3,156 total locality items listed from 1,475 sites worldwide. 8,171 photos.

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Details on over 500 types of gem

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Gemdat is a unique reference web site on gems and gemology with something for everyone from beginners to experts. Join our community and get involved!

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Gemstone Cuts

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Birthstone lists

For thousands of years people have associated gemstones with months of the year. Different cultures have different associations. Select below:

Jan	garnet	Jul	ruby
Feb	amethyst	Aug	peridot
Mar	aquamarine, bloodstone	Sep	sapphire
Apr	diamond	Oct	opal, tourmaline
May	emerald	Nov	topaz, citrine
Jun	pearl, moonstone, alexandrite	Dec	turquoise, zircon, tanzanite

Jan	garnet	Jul	ruby
Feb	amethyst	Aug	sardonyx, peridot
Mar	bloodstone, aquamarine	Sep	sapphire
Apr	diamond	Oct	opal, tourmaline
May	emerald	Nov	topaz
Jun	pearl, moonstone	Dec	turquoise, lapis lazuli

Jan	garnet	Jul	ruby, carnelian
Feb	amethyst	Aug	peridot, sardonyx
Mar	aquamarine, bloodstone	Sep	sapphire, lapis lazuli
Apr	diamond, rock crystal	Oct	opal
May	emerald, chrysoprase	Nov	topaz, citrine
Jun	pearl, moonstone	Dec	tanzanite, turquoise

Jan	garnet	Jul	turquoise, onyx
Feb	amethyst, hyacinth, pearl	Aug	sardonyx, carnelian, moonstone, topaz
Mar	bloodstone, jasper	Sep	chrysolite
Apr	diamond, sapphire	Oct	opal, aquamarine
May	emerald, agate	Nov	topaz, pearl
Jun	cat's eye, turquoise, agate	Dec	bloodstone, ruby

Jan	garnet, hyacinth	Jul	ruby, sardonyx
Feb	amethyst	Aug	alexandrite
Mar	jasper	Sep	chrysolite
Apr	sapphire	Oct	beryl
May	emerald	Nov	topaz
Jun	agate, chalcedony	Dec	turquoise, chrysoprase

Jan	hyacinth	Jul	carnelian
Feb	amethyst	Aug	onyx
Mar	heliotrope	Sep	chrysolite
Apr	sapphire	Oct	aquamarine
May	emerald	Nov	topaz
Jun	chalcedony	Dec	chrysoprase

Jan	serpent stone	Jul	sapphire
Feb	chandrakanta	Aug	ruby
Mar	gold, Siva-linga	Sep	zircon
Apr	diamond	Oct	coral
May	emerald	Nov	cat's eye
Jun	pearl	Dec	topaz

Aquarius	turquoise, hawk's eye	Leo	rock crystal
Pisces	amethyst, quartz	Virgo	citrine, agate
Aries	jasper, carnelian	Libra	citrine, smoky quartz
Taurus	carnelian, rose quartz	Scorpio	carnelian
Gemini	citrine, tiger's eye	Saggittarius	sapphire, chalcedony
Cancer	chrysoprase, aventurine	Capricorn	onyx, cat's eye

Aquarius	garnet	Leo	onyx
Pisces	amethyst	Virgo	carnelian
Aries	bloodstone	Libra	peridot
Taurus	sapphire	Scorpio	beryl
Gemini	agate	Saggittarius	topaz
Cancer	emerald	Capricorn	ruby

Gemstone Cuts

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Copyright © Jolyon & Katya Ralph 1993-2026. Site Map. Photographs are copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.