Smooth surfaced, non-faceted cuts of gemstones, in any shape.

Cabochons Index

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Tenorite - Mohs 3.5

Tenorite is a copper oxide with a grey-black color. It is often found intermixed with chrysocolla, azurite, and malachite.

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Tiffany Stone
Bertrandite - Beryllium Ore - Purple Opal - Ice Cream Opalite - Opal Fluorite - Opalite - Opalized Fluorite - Utah Lavendar


Read about Tiffany Stone                                            See Tiffany Stone Jewelry

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Tiger Eye - (Tiger-Eye, Tigers Eye, Tigereye, Tiger’s Eye) - Mohs 6.5-7

Read about Tiger Eye ~ Hawks Eye ~ Tiger Iron ~ Marra Mamba ~ Pietersite

What all of these have in common is that light glides across the surface as the stone is moved, lighting up sections of the stone. This effect is called chatoyancy and is caused by the asbestos in these stones.

Where these stones differ is the colors and patterns.

Tiger Eye and Hawks Eye


Australian Tiger Iron from the Marra Mamba formation.


Tiger Iron Matrix


Pietersite

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Tiger Iron

See Australian Tiger Iron under Tiger Eye.

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Tile Ore

See Cuprite.

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Tourmalated Quartz

Clear quartz with inclusions of black or dark green tourmaline needles.

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Trent Sagenite - Mohs 6.5 - 7


Read about Trent Sagenite

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Turquoise - Mohs 6


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Variquoise

Variquoise is a term used to describe material where variscite and turquoise are intermingled .

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Variscite (Utahlite, Lucinite)- Mohs 3.5-5


Read about Variscite                                            Find Variscite Jewelry

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Verde Antique

Verde Antique is a green serpentine with white streaks that are normally calcite.

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Victoria Stone (Imori) - Mohs 5.5-6


Read about Victoria Stone                                    Find Victoria Stone Jewelry

Williamsite

See Serpentine.

Zoisite- Mohs 6.5

Gem grade zoisite doesn’t normally go by the name zoisite, except for ruby-zoisite (anyolite), where the zoisite is an opaque green color.

Other gem varieties -
Tanzanite - transparent blue
Thulite - opaque pink

Small quantities of transparent zoisite varieties in other colors have been found.