1, the glow of moonstone is extremely special. When turning a gem, it often moves in a thin slice, while the quartz cat's eye moves in a straight line.
2. Feldspar texture is obvious, hackly fracture can be seen in some small sections, and other similar gems are mostly conchoidal fracture with smooth camber.
3. "Centipede" inclusions sometimes appear in moonstone, which can be used as an important basis for identification. When the above characteristics are not obvious, it is necessary to distinguish them by measuring the refractive index and specific gravity of gems. Identify key typical cleavage and characteristic inclusions.
4. The blue of moonstone is crystal clear, and the transparency of moonstone is also high. Good quality moonstone will be translucent, and the moonlight eye is right in the middle.
Extended data
Moonstone is a gem mineral consisting of orthoclase and albite alternately. Moonstone is mainly produced in Sri Lanka, Myanmar, India, Brazil, Mexico and Alps in Europe, among which Sri Lanka is the most precious.
Moonstone is usually colorless to white, but also light yellow, orange to light brown, blue gray or green, transparent or translucent, with special moonlight effect, hence the name.
This is because the layered cryptocrystals of the two kinds of feldspar intersect each other in parallel, and the refractive index is slightly different, which scatters visible light. When there is cleavage plane, it may be accompanied by interference or diffraction. The comprehensive effect of feldspar on light makes the surface of feldspar produce a blue floating light. If the layer is thick, it will produce grayish white, and the floating light effect will be worse.
reference data
Baidu Encyclopedia entry-Moonstone (a gem mineral)