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Feb 5
Can someone help me identify this rock?

Can someone help me identify this rock?

Uvarovite garnet from Russia

What is this mineral?!?!?

Vanadinite

Mohs hardness: 3

colors: orange-red and yellow

Vanidinite is a secondary mineral, forming from oxidized ore deposites containing lead. It is a major source of the element vanadium. It also usually shows perfect hexagonal crystals.

Got some vanidinite and cinnabar

Will post soon

Oct 9
More fluorite

More fluorite

Oct 9
Rosasite with calcite

Rosasite with calcite

Corundum

Colors: many

Mohs hardness scale: 9 (defining mineral)

Also know as ruby or sapphire. (polished ruby shown on the right) only the red variety of corundum is called a ruby, while sapphire’s are every other color. Corundum is used in high temperature ceramics, an abrasive for polishing metal and has been made into sandpaper.

Corundum

Colors: many

Mohs hardness scale: 9 (defining mineral)

Also know as ruby or sapphire. (polished ruby shown on the right) only the red variety of corundum is called a ruby, while sapphire’s are every other color. Corundum is used in high temperature ceramics, an abrasive for polishing metal and has been made into sandpaper.

Aug 6

Aragonite

colors:colorless, white, gray, yellowish, reddish, green

Mohs hardness: 3.5-4

Named after where it was first found, the Aragon region of Spain. Aragonite is a polymorph of calcite (meaning that it is made up of calcium carbonate, the same exact chemical composition as calcite, but both of these minerals have different crystal structures.)

Jul 6
Travertine

Moh’s hardness: ?

Travertine is another way of saying “banded limestone” or “banded marble”.(much like saying agate for banded chalcedony) Travertine is formed by the precipitation of calcium carbonate rich water.

Travertine

Moh’s hardness: ?

Travertine is another way of saying “banded limestone” or “banded marble”.(much like saying agate for banded chalcedony) Travertine is formed by the precipitation of calcium carbonate rich water.