Although long known best for being misidentified as ruby, the spinel gem is beautiful in its own right. Its colors, […]

Sphene, also known as titanite, has rich body colors, strong trichroism, and a fire that exceeds diamond. Although softer than

Sphalerite occurs in many colors. With a dispersion over three times that of diamond and an adamantine luster, faceted specimens

Typically blue, durable, and easy to cut, sodalite is highly desired by hobbyists. Even stones that lack transparency make lovely

Smoky quartz comes in every shade of brown, from a light tan to nearly black. This gem is known for

Smithsonite occurs across the globe, but facetable crystals are extremely rare. These gems can show a wide range range of

Smaltite is a collectors oddity, cut only as cabochons. It is seldom seen in collections since it is not especially

Long thought to be brown peridot, sinhalite was investigated in 1952 and found to be a new mineral. When cut,

Simpsonite is an extremely rare gemstone. The material from Western Australia is bright yellow-orange and very beautiful. The mineral is