Q gemstones

Welsh Blue cabochon

Quartz with gold

Natural gemstone. Hardness of 6

R gemstones

Rhyolite with blue quartz and pink feldspar

Rhyolite with blue quartz & pink feldspar

Natural gemstone. Hardness of 6

Ruby in fuchsite

Ruby in fuchsite

Natural gemstone. Ruby has a hardness of 9, fuchsite only has a hardness of 2.5

Ruby in kyanite

Ruby in kyanite

Natural gemstone. Ruby has a hardness of 9, kyanite has a hardness of 5-7

Ruby in zoisite

Ruby in zoisite

Natural gemstone. Ruby has a hardness of 9, zoisite is brittle & only has a hardness of 6 

Rutilated quartz with rutiles in star formation

Rutilated quartz with hematite

Natural gemstone. Hardness 7

S gemstones

Schalenblende

Natural gemstone. Hardness of 3.5-4 

Scapolite

Scapolite

Natural gemstone. Hardness of 6

Septarian cabochon

Septarian

Natural gemstone. Hardness of 3.5-4

Seraphinite

Seraphinite

Natural gemstone. Hardness of 2-2.5

Sillimanite

Sillimanite

Natural gemstone. Hardness 6-7

Spessartine garnet

Spessartine garnet

Natural gemstone. Hardness 7.25

Sphene

Sphene

Natural gemstone. Hardness 5-5.5

Spodumene

Spodumene

Natural gemstone. Hardness 7

Surfite cabochon

Surfite

is a manmade gemstone cut from layers of hardened resin which have built up in the process of making surfboards

T gemstones

Thulite cabochon

Thulite

Natural gemstone. Hardness of 6-6.5

Tiffany stone or Bertrandite

Tiffany stone

Natural gemstone. Hardness of 4, equivalent to that of fluorite - a higher quartz or chalcedony content may increase hardness to 5

Tiger iron

Tiger iron

Natural gemstone. Hardness between 5.5 and 6.5

Trapiche emerald

Trapiche emerald

Natural gemstone. Hardness 7.5

Tsavorite garnet

Tsavorite garnet

Natural gemstone. Hardness 7-7.5

U, V & W gemstones

Variscite

Variscite

Natural gemstone. Hardness 3.5-5

Welsh Blue cabochon

Welsh Blue

Manmade - a by-product of the iron smelting process in Wales.

X, Y & Z gemstones

None yet but this resource is continually being added to.