Labradorite engravings in a beautiful mix (minimum 12 pieces)

The mineral labradorite is a calcium-sodium-aluminum tectosilicate with the chemical formula (Ca,Na)(Si,Al)4O8. It belongs to the feldspars. The colorless, white, gray, or light green labradorite has a glassy luster, a white streak color, perfect cleavage according to crystal plane [001], and good cleavage according to [010]. The average density is 2.69 and the hardness is 7. The crystal system is triclinic and the mineral is neither radioactive nor magnetic. The characteristic play of colors, known as labradorization, is caused by light refracting on microscopic crystals of various dark minerals that lie on the cleavage surfaces. Labradorite usually occurs in an amorphous or granular form; the mineral rarely or never forms crystals. Labradorite is undoubtedly the most famous of the gemstones and ornamental stones that display such a play of colors. When the stone is judiciously cut, the play of colors is even better highlighted. But even on the rough chunks, the beautiful labradorization is often visible. There are few minerals that change color as dramatically as labradorite. The name of the mineral labradorite is derived from the Labrador Peninsula in Canada, where it was first described. The stone was discovered in 1780 on the east coast of the Labrador Peninsula by a priest, and named after the island by him. He found a large number of boulders with a striking gray color that changed to dark blue and green hues when rotated. This discovery aroused great interest among scientists at the time, and it was determined that this was a case of a soda-lime feldspar or plagioclase. Labradorite is a common feldspar in metamorphic and igneous rocks such as pegmatite. It is part of the plagioclase series (albite-anorthite). The type locality of labradorite is located on the Canadian Labrador Peninsula. Deposits can also be found in Australia, Madagascar, Mexico, Russia, the United States, and Finland.