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Home
» Gemstones
Gemstones
Popular Gemstone Items
Diamonds from Coal?
Diamonds from Coal?
They form under several conditions that rarely involve coal.
USA Diamond Mine
You Can Be A Diamond Miner!
At the Crater of Diamonds mine you can keep what you find.
What Is Jade?
Jade
has been used as a gemstone and a tool-making material for for 1000s of years.
Blood Diamonds
Blood Diamonds
: Illegally-traded diamonds that may have been stolen or used to fund conflict.
Synthetic Diamonds
Synthetic Diamonds
: Large, nearly-flawless diamonds are now possible with chemical vapor deposition.
Ametrine Gemstones
Ametrine The Bicolor Amethyst
A crystal of quartz with zones of amethyst and citrine.
Opal Photos
Pictures of Opal
: A collection of different types of opal from all over the world and Mars too!
Diamond: The Mineral
Diamond
has many surprising properties that make it useful for much more than jewelry.
US Gemstones
US Gemstones:
Which states lead the USA in gemstone production? Find out here.
Amazing Agate Photos
Beautiful Agates
: A gallery of spectacular agate photos and descriptions by Richard Weston.
Cabochons
Cabochons:
A photo gallery of cabochon gemstones from around the world.
Platinum Inclusions
Platinum Inclusions
reveal the geological history of the Bushveld Complex.
Newest Gemstone Items
US Diamond Mines
US Diamond Mines:
Where are and where could diamonds be produced in the USA?
Spodumene
Spodumene
is a pegmatite mineral, an ore of lithium and sometimes a gemstone.
Facts About Diamonds
Facts About Diamonds
: You are a diamond expert if you know all of these!
Uses of Kyanite
Kyanite
is a metamorphic mineral used to make ceramics, gemstones and spark plugs.
Guatemala Jade
Tectonic History In Jade:
Dates of metamorphism and fault motion locked in jade.
Diamond Producers
Diamonds
are mined in many countries and their relative importance changes frequently.
Sunstone
Sunstone
: a feldspar with aventurescence caused by light reflecting from platy inclusions.
Spinel
Spinel
: The gemstone that was confused with ruby and sapphire for over 1000 years.
Popigai Diamonds
The World's Largest Diamond Deposit
is under Popigai Crater in northern Russia.
Finding Diamonds
Finding More Diamonds:
Deep mantle and plate tectonics data can help diamond hunters.
Corundum
Corundum
is used as an abrasive and is the mineral of both ruby and sapphire.
Topaz
Topaz
is a popular birthstone and the eighth mineral in the Mohs Hardness Scale.
Rock Tumblers
Free Guide To Rock Tumbling
: A dtep-by-step guide to tumble-polishing rocks into
gemstones
.
