Best Feldspar

A plagioclase feldspar exhibiting aventurescence caused by reflective hematite or goethite platelets; notable gem-quality deposits occur in Oregon, USA.

A trade name for high-quality Finnish labradorite displaying the full spectral range of labradorescence, mined primarily in the Ylämaa region of Finland.

Labradorite is a plagioclase feldspar mineral displaying a striking optical phenomenon called labradorescence, originally discovered on the Isle of Paul in Labrador, Canada, in 1770.

Spectrolite is a highly chatoyant, dark variety of labradorite feldspar displaying exceptional rainbow iridescence, discovered in Finland and named in 1935.

A plagioclase feldspar of the albite-anorthite series named after the Andes Mountains, occasionally displaying red-to-green color change in gem-quality material.

Sunstone is a plagioclase feldspar exhibiting a glittery optical effect called aventurescence due to light reflecting off embedded copper or hematite inclusions, notably found in Oregon.

Orthoclase is a potassium-rich tectosilicate feldspar mineral first named in 1823, notable for its moonstone varieties and pale yellow gemstones.

Bytownite is a calcium-rich plagioclase feldspar mineral named after Bytown, Canada, in 1835, notable for its range of yellow to golden-brown hues.

Sanidine is a high-temperature potassium feldspar mineral first described in 1808, notable for its glassy appearance and occurrence in volcanic rocks.

Andesine-labradorite is a plagioclase feldspar mineral valued for its red to green color play, with controversial natural sources claimed in Mongolia.

Amazonite is a green variety of microcline feldspar, famously utilized in ancient Egyptian art like the scarab beetle found in the tomb of Pharaoh Tutankhamun, and mined in Colorado.