Best December Birthstone
Tanzanite is the blue-to-violet gem variety of zoisite, a calcium aluminium silicate mineral. It was identified as a commercial gemstone in 1967 and is mined in a restricted area of northern Tanzania near Mount Kilimanjaro, giving the material its name and limited geographic source. Tanzanite is str...
Turquoise is an opaque blue-to-green mineral and a hydrated phosphate of copper and aluminium. It has been used as an ornamental stone and jewelry material for thousands of years, and deposits in the southwestern United States have a long history of mining, trade, and use in Native American arts. Th...
Zircon is a nesosilicate mineral highly regarded for its brilliant luster and high refractive index, with notable specimens historically sourced from the alluvial deposits of Cambodia.
