The crystal is composed of three elements: crystal face, crystal edge and apex angle. It has a polyhedral shape and is a geometric body occupying three spaces. The three or four imaginary straight lines that meet in the center of the crystal are called the crystal axis of the crystal. According to the length of […]
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The luster of gems has the following types: ① Diamond luster refers to the luster produced by gems with high refractive index. Generally refers to the gloss shown by diamonds. Close to (or slightly inferior) diamond luster is called sub-diamond luster, such gems include zircon, garnet and so on. ②Glass luster refers to the luster […]
Ruby and sapphire are simple oxide minerals, belonging to the trigonal crystal system, the crystals are mostly hexagonal columnar with glassy luster, transparent to translucent, hardness of 9, second only to diamond; stable chemical properties, and good toughness and Obvious pleochroism. Although ruby and sapphire have the same chemical composition, they become crystals with different […]
In mineralogy, emeralds belong to the same beryl group as aquamarine and beryl. Beryl is a silicate containing beryllium and aluminum. Its composition often contains potassium, sodium, calcium, magnesium, iron, lithium, bismuth, manganese, cesium, chromium, vanadium, nickel and other trace elements. Some of them are pigment ions, causing beryl to have yellow (oltin) pink or […]
It is said that the Holy Grail used by Jesus in the Last Supper was carved from emeralds. One of the glasses of the ancient Roman tyrant Nero was also made of emeralds, and he used his power to search for emeralds everywhere. In the Iranian royal family of ancient Persia, there are thousands of […]
Chrysoberyl belongs to the spinel family in mineralogy. It is an oxide mineral containing beryllium and aluminum, and contains a small amount of trace elements such as iron, titanium and chromium. It belongs to the orthorhombic crystal system, the crystal is short column, plate or pseudo-hexagonal ring, with glass luster, transparent to translucent, hardness of […]
The discoloration effect of alexandrite is the result of its selective absorption of light waves. Its transparent crystal can pass red and green light. Shu sababli, under different wavelength light sources, when the light source (such as incandescent lamp) contains more red components, it will appear red; when the light source (Such as fluorescent lamps or […]
There is a story circulating in the West: In the 18th century, a hot summer in Amsterdam, the Netherlands, a few children were playing in the sun with some colorful stones brought back from overseas by voyagers, and found that these stones appeared in the sun. A strange phenomenon, they asked their parents to come […]
Although the Chinese aquamarine has the word “sea” before “sapfir”, it is not a sapphire, so it is not literal. The phrase should be “sea blue gem”, the color is like sea water, it is light blue; the small aquamarine, the color is extremely light, like the sea water held up: almost colorless and transparent. […]
Olivine is a magnesium iron silicate mineral and belongs to the orthorhombic crystal system. The crystals are short columnar. Complete crystals are rare. Most of them are irregular round granular aggregates. They have glass luster, transparent to translucent, and hardness of 6.5-7.0. Olivine is a kind of self-colored gemstone, which is green due to iron […]