First of all, the feldspar of the gem family
1. starlight sunshine stone.
2. Orange sunshine stone.
3. Blue Moonstone.
4. Rainbow Moonstone.
5. Blue Labrador.
6. Rainbow salad feldspar.
7. Green Tianhe Stone.
8. Blue Tianhe Stone.
Second, what is feldspar?
Feldspar is an aluminosilicate mineral containing calcium, sodium and potassium, which has glass luster. It is transparent and influenced by other mineral impurities, and its colors are very rich, including common monochromatic, transparent and translucent.
Third, the source of feldspar
1. Moonstone: Moonstone is a kind of feldspar gem with moonlight effect, generally colorless to white, reddish brown, green, dark brown and so on. , usually blue, colorless or yellow. Mainly produced in Sri Lanka, India, Madagascar, Myanmar, the United States and Tanzania.
2. Tianhe stone: Tianhe stone is a green microcline variety, including bright green or bright blue-green to light blue in different shades. Its producing areas are mainly distributed in Canada, Mozambique, Brazil and China.
3. Sunshine stone: generally yellow, orange or brown, with flicker phenomenon caused by reflection of light by fine flaky mineral inclusions, also known as "placer gold effect". The most famous place of origin of sunlight stone is Norway.
4. Labrador stone: generally gray and brownish gray, which can produce halo effect. The important producing area of gem-grade Labrador is the northern middle coast of Labrador.
Four. Common gems of feldspar family
A. potash feldspar
1. Moonstone
2. Tianhe stone
B. plagioclase
1. Sunshine Stone
2. Fula basalt
1 moonstone
Moonstone, also called moonstone, is a kind of feldspar, which is composed of a mixture of cryolite and albite. moonlight
There is a pale blue halo on the surface of the stone, which is as beautiful as the hazy moonlight. This is the moonlight effect and the origin of the name moonstone. There are many gems with moonlight effect in nature, but only feldspar minerals with moonlight effect are called moonstone.
2 Tianhe stone
Tianhe stone is a common mineral, which occurs in volcanic rocks. It belongs to one of feldspar minerals and is an aluminosilicate containing potassium. The color of microcline varies from white to beige and red, and it is glassy and fragile. It has a green variety called Tianhe Stone. Micro-feldspar is a member of feldspar minerals. Tianhe stone, sometimes regarded as a gem, is a kind of green microcline.
3 sunshine stone
The scientific name of the sun stone is "sun stone" or "Venus feldspar", which is a kind of plagioclase. It is named because there are many flaky mineral inclusions with neat comments and bright colors in feldspar, which reflect shining bright spots under the illumination of light, like the radiant light of the sun. It is the product of sun worship of all nationalities in the world. Distributed in western Norway and parts of the United States, it is also the state stone of Oregon.
4 Labrador stones
Labrador is a kind of plagioclase, which is an isomorphic series and triclinic system composed of albite and anorthite. Most of the crystals are tabular or columnar, white gray or gray-black, occasionally yellow, brown, red and green, glassy, transparent or slightly transparent, with a relative density of 2.69-2.2 and a hardness of 6-6.5. There are two groups of plagioclase cleavage and no fluorescence reaction. Pure and beautiful plagioclase can be used as a gem.