Ambligonite, montebrasite (gebronite) is a rather rare mineral, but even rarer are the stones that come to jewelers for processing. Amblygonite from buckwheat is oblique, named so because of its cleavage in different directions, and is lithium-aluminum-fluorinehydroxyl phosphate. The color of the mineral ranges from colorless, yellow and cyan to pale pink. There is a glass shine. Hardness about 6; density within: 3,0-3,1 g/cm3. It is not very popular with jewelers because it is difficult to find such a stone suitable for cutting, and if there are large minerals, the weight of the gemstone is not more than 15 carats after processing. The record weight of the cut amblygonite is 65.5 carats. It was discovered by Ambligonite and also named by August Breithaupt (1791-1873) as a German by origin in 1817 in Saxony. Externally, he resembles Brazilite, Spodumene, feldspar and Scapolite. Amblygonite and montebrasite are quite fragile stones and cannot boast of any special properties. And besi