Gems We Test

Ruby

Corundum

Ruby is one of the most prized gemstones in the world, belonging to the corundum family. Its hardnes...

Blue Sapphire

Corundum

Blue sapphire, also a variety of corundum, is celebrated for its beauty, hardness, and versatility. ...

Padparadscha Sapphire

Corundum

Padparadscha sapphire is a rare and highly sought-after variety of sapphire, prized for its unique p...

Fancy Sapphire

Corundum

Fancy sapphires are sapphires that display colors other than blue including pink, green, yellow, pur...

Emerald

Beryl

Emerald, a variety of beryl, is celebrated for its rich green color and historic significance. Its v...

Spinel

Spinel is a durable and vibrant gemstone often mistaken for ruby or sapphire due to its rich colors....

Garnet

Garnet is a group of silicate minerals known for its wide color range, robust durability, and divers...

Tourmaline

Tourmaline is a complex boron silicate mineral valued for its wide range of colors. Popular varietie...

Quartz

Quartz is one of the most abundant and versatile gemstones, occurring in transparent to opaque forms...

Moonstone

Moonstone is a feldspar mineral prized for its adularescence—a glowing, moonlight-like shimmer. Popu...

Zircon

Zircon is a natural, high-dispersion gemstone known for its brilliance and fire. Popular colors incl...

Tanzanite

Zoisite

Tanzanite, a variety of zoisite, is renowned for its striking blue to violet hues. Popular colors ra...

Sphene (Titanite)

Sphene, also known as Titanite, is a gemstone admired for its exceptional brilliance and fire. Popul...

Topaz

Topaz is a silicate mineral prized for its hardness, clarity, and wide range of colors. Popular colo...

Peridot

Peridot is a gem-quality olivine known for its distinctive lime to olive green hues, sometimes with ...

Spodumene

Spodumene is a pyroxene mineral prized for its gem-quality varieties Kunzite (pink to violet) and Hi...

Opal

Opal is a hydrated silica gemstone admired for its play-of-color, a phenomenon where flashes of rain...

Iolite

Iolite, also known as cordierite, is valued for its deep blue to violet-blue hues and strong pleochr...

Sillimanite (Fibrolite)

Sillimanite, sometimes called Fibrolite, is a silicate mineral known for its brown, green, or yellow...

Kornerupine

Kornerupine is a rare borosilicate mineral prized for its green to brown-green hues, sometimes displ...

Diopside

Diopside is a pyroxene mineral valued for its green, black, and brown hues, with Chrome Diopside bei...

Enstatite

Enstatite is a magnesium silicate mineral known for its brown, green, and yellowish hues. It occasio...

Andalusite

Andalusite is an aluminum silicate mineral valued for its strong pleochroism, showing green, brown, ...

Grandidierite

Grandidierite is an extremely rare magnesium aluminum borate mineral prized for its blue-green hues,...

Serendibite

Serendibite is one of the rarest gemstones globally, known for its dark blue, blue-green, or brownis...

Taaffeite

Taaffeite is an extremely rare beryllium aluminum oxide gemstone, prized for its lilac, pink, and vi...

Jeremejevite

Jeremejevite is a rare aluminum borate mineral known for its colorless, pale blue, and light yellow ...

Idocrase (Vesuvianite)

Idocrase, also known as Vesuvianite, is a silicate mineral valued for its green, brown, yellow, and ...

Chalcedony

Quartz

Chalcedony is a microcrystalline variety of quartz, known for its soft blue, grey, white, and transl...