Before the development of synthetic technology, the scientific name of hyacinth zircon is the closest natural gemstone to diamond, so zircon can be said to be the earliest natural substitute for diamond, because it has a fairly high refractive index and its dispersion rate is close to that of natural diamonds. Compared with diamonds, the […]
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Moonstone is a kind of Feldspar gems of Feldspar. Feldspar and quartz are very common and very important minerals in the earth’s crust. According to the characteristics of feldspar, it can be divided into Orthoclase and Plagioclase. Moonstone is a kind of orthoclase, with a refractive index of 1.518-1.526, a birefringence difference of 0.005, a […]
Calcite is a calcium-containing carbonate mineral. It is a very important mineral in the earth’s crust. It is often used as a teaching material to explain the characteristics of gems, but it is rarely used as jewelry because it has a very high birefringence difference and a perfect solution. Reason, although other gems also have […]
In the gem trade, “carat” is often used as the unit of quality. The term carat, originally in Greek, means the seed of a kind of “carob tree” that grows on the Mediterranean coast of Europe. The ancients believed that the quality of each seed was the same, so it was used as a weight […]
Humans have been searching, mining and using gemstones for nearly 6000 years. For example, the famous Chinese “Hetian jade” has been discovered as early as the primitive society. According to incomplete statistics, there are more than 600 kinds of gem mines discovered and mined in the world, and these gem resources are mainly distributed in […]
Among the five continents, Asia is not the continent with the most gem varieties and production. The other four continents have their own strengths. 2. Africa The African continent is extremely rich in gem production and is known as the richest gem warehouse on earth. The main gems are diamonds, emeralds, tanzanites, golden emeralds, rubies, […]
The strength of dispersion of different gemstones is different. It is usually expressed by the difference between the refractive index measured by red light at 686.7nm and purple light (460.8nm 1), and is called dispersion value. Generally, the dispersion value greater than 0.03 is called strong dispersion. Colorless or light-colored gems with strong dispersion can […]
1. Helps identify gem species There are special inclusions in some gems, and the types of gems can be determined by studying these inclusions. For example, rubies often contain needle-shaped rutile particles, and they intersect at 60 angles. This is determined by the symmetry of the ruby itself. Therefore, it is a unique inclusion of […]
People usually call the inclusions in gems “impurities.” Therefore, the inclusions in gems are also a factor in evaluating the quality of gems; for example, in the quality evaluation of diamonds, an important criterion is “clarity”, that is, the cleanliness of the interior of the gem. Generally speaking, the less impurities in the gem, the […]
Rock Crystal, the mineral name is quartz, is a very old gem. For thousands of years, crystal has been regarded as a symbol of unyielding, purity and kindness with its pure, transparent and hard texture. Legend has it that when the ancient Romans first obtained crystal in the Alps, they thought it was changed by […]