Q gemstones
Quartz with gold
Natural gemstone.
R gemstones
Rhyolite with blue quartz & pink feldspar
Natural gemstone.
Ruby in fuchsite
Natural gemstone.
Ruby in kyanite
Natural gemstone.
Ruby in zoisite
Natural gemstone.
Rutilated quartz with hematite
Natural gemstone.
S gemstones
Schalenblende
Natural gemstone.
Scapolite
Natural gemstone.
Septarian
Natural gemstone.
Seraphinite
Natural gemstone.
Sillimanite
Natural gemstone.
Spessartine garnet
Natural gemstone.
Sphene
Natural gemstone.
Spodumene
Natural gemstone.
Stichtite
Natural gemstone.
Surfite
is a manmade gemstone cut from layers of hardened resin which have built up in the process of making surfboards
T gemstones
Terahertz stone
Manmade gemstone.
Thulite
Natural gemstone.
Tiffany stone
Natural gemstone.
Tiger iron
Natural gemstone.
Trapiche emerald
Natural gemstone.
Tsavorite garnet
Natural gemstone.
U, V & W gemstones
Variscite
Natural gemstone.
Welsh Blue
Manmade - a by-product of the iron smelting process in Wales.