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3 kinds of Gemstones

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1dave
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3 kinds of Gemstones Jul 9, 2024 8:50:09 GMT -5 NRG, miket, and 7 more like this

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Post by 1dave on Jul 9, 2024 8:50:09 GMT -5

IGNEOUS:

Gemstones found in igneous rock include the quartzes (including amethyst, citrine and ametrine), the garnets, moonstone, apatite, diamond, spinel, tanzanite, tourmaline, topaz and zircon. Read more here: www.geologyin.com/2018/03/what-gems-are-found-in-igneous-rock.html

Occasionally, varieties of volcanic glass, obsidian, are cut and fashioned as gemstones. Obsidian is an amorphous mineraloid with the hardness of approximately 5.5. Varieties of obsidian include: Snowflake obsidian ( with inclusions of the mineral cristobalite) Rainbow obsidian Red mahogany obsidian Silver sheen obsidian Midnight lace obsidian Pumpkin obsidian Read more here: www.geologyin.com/2018/03/what-gems-are-found-in-igneous-rock.html

METAMORPHIC

Examples of gems commonly found in metamorphic rocks include garnet, ruby, sapphire, jade, kyanite, and staurolite. Read more here: www.geologyin.com/2024/04/gemstones-in-metamorphic-rocks.html

SEDIMENTARY

There are also sedimentary gems: Agate, Azurite, Beryl, chrysoprase, chrysocolla, Malachite, opal, quartz, turquoise.
hamed-geo.com/gemstones-found-in-sedimentary-rocks/

Sedimentary

For more information about Gem Stones, See:
www.geologyin.com/

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Welcome to the Rock Tumbling Hobby Forum where we share a love of rocks and a sense of community as enduring as the stones we polish. The RTH Forum of www.RockTumbling.com is an Amazon Associate site and we earn money from qualifying purchases you make after clicking on our links such as this Rock Tumbling Supplies on Amazon link for instance, or any of our various product ads and banners. By clicking our links every time you begin your Amazon shopping experience, you are generating a bit of revenue for the forum which helps us cover our expenses. Thank you for your support!