Since more than 20 kinds of gem minerals with cat’s eye effect have been discovered in the world, and their beauty and value are far less than the golden-green opal, some people call golden-green opal “true opal” and refer to the other All kinds of gems with cat’s eye effect are called “false opals”. Však, […]
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alexandrit, Také známý jako “allex”, is a variety of chrysoberyl which has a discoloration effect due to the chromium content; if it has both a discoloration effect and a cat’s eye effect, říká se tomu “alexandrite opal”, which is very rare and extremely A precious variety, weighing 5ct, is worth more than US$5,000 per carat. […]
Tourmaline is mainly used for jewelry such as ring face and necklace; delicate colors can be carved into crafts. Tourmaline cat’s eye is mainly used as ring face. Because tourmaline has piezoelectric effect and pyroelectricity, it also has important uses in science and technology. The name of tourmaline comes from its own properties of generating […]
Existují dvě verze zdroje anglického názvu Topaz: jeden je odvozen od starého jména “Topas” malého ostrova v Rudém moři. Ostrov nevyrábí topaz, ale je bohatý na Peridot. Místní obyvatelé to považují za žlutou. Rozmanitost olivinu se nazývá “topas”, proto […]
Golden jade refers to a kind of golden topaz, most of which is the yellow color of naturally produced white topaz (also known as topaz) after heat treatment. Some people call a kind of natural citrine golden jade, which should be called golden crystal correctly. Brazil produces the world-famous premium wine-colored topaz; Siberian pegmatite in […]
Natural opal is a color-changing block in opal. According to the color characteristics and optical effects, there are mainly 4 odrůd: (1) Black opal: It is a gem opal that strongly changes color on a blue, black or green base. It is translucent to opaque, and changes color to deep and bright. It is the […]
Peridot is named for its unique olive green. Its chemical composition is magnesium iron silicate, which is the main component mineral of ultrabasic rocks. The orthorhombic crystal system has short or long columnar crystals, but it is often produced in granular form. Tvrdost 6.5-7; density 3.3～4.4g/cm3; glass luster to grease luster, often transparent. Gemstones similar […]
The English name of garnet means “jako semeno”, which means it is very similar to the “seed” in pomegranate. Often referred to as “granát” for short. The technical name of the garnet gemstone in my country is “Výběr”. Garnet is a big family, which can be divided into two series and six varieties. Namely: […]
Crystal is a very ancient gem. In the ancient works of “Guang Ya” and other works in China, there are many kinds of crystals such as “water jade”, “water essence”, “jade crystal”, “thousand-year ice” a “shining stone”. Jméno, the aliases such as “water essence” a “thousand-year ice” are obviously due to the lack of […]
According to the characteristics and uses of crystals, it can be divided into four categories: (1) Piezoelectric crystal: Some of the crystals have a very interesting piezoelectric effect, to je, the greater the pressure (or pulling force) applied to the slices of the piezoelectric crystal, the more electric charges are generated. Its characteristics make it […]