Joined Jul 2021 Viet Nam
I hope that with official information updated from diamond researches and trading activities around the world, readers can grasp the necessary basic knowledge to find a diamond that best suits your budget.
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A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, together with amethyst, sapphire, emerald, and diamond. The word ruby comes from ruber, Latin for red. The color of a ruby is due to the element chromium.
Tahitian pearls come in a range of colors from white to black. They can contain various undertones and overtones of green, pink, blue, silver and yellow. The most valuable of these are of the darker variety, as the naturally dark tones of the Tahitian pearls is a unique quality among pearls. A true black Tahitian pearl is extremely rare, and largely considered one of the most beautiful kinds of pearls in the world. Most Tahitian pearls that are identified as “black” are actually charcoal grey, silver, or dark green. An advantage of the Tahitian pearl is that the oyster inside of which they grow is quite large, sometimes weighing as much as ten pounds. This means that a Tahitian pearl can more easily grow to a larger-than-average size.
Tiger's eye (also called tiger eye) is a chatoyant gemstone that is usually a metamorphic rock with a golden to red-brown colour and a silky lustre. As members of the quartz group, tiger's eye and the related blue-coloured mineral hawk's eye gain their silky, lustrous appearance from the parallel intergrowth of quartz crystals and altered amphibole fibres that have mostly turned into limonite.
Lapis lazuli has been used since ancient times and remains popular today. This gemstone has been prized for its bright, blue color and used for inlay and intarsia as well as for pigments for cosmetics and paintings. Its contrast and eye appeal is irresistible. Today, jewelry is its predominant use.
Iolite is the gemstone variety of the mineral cordierite. Iolite crystals are usually transparent to translucent forms of the mineral. Over recent years, iolite has become increasingly popular due to its affordability. It serves as an excellent substitute for more expensive stones. The colour of the stones can be quite varied, ranging anywhere from very light blue to deeper blue, usually with a beautiful purplish tinge.
Iolite is the gemstone variety of the mineral cordierite. Iolite crystals are usually transparent to translucent forms of the mineral. Over recent years, iolite has become increasingly popular due to its affordability. It serves as an excellent substitute for more expensive stones. The colour of the stones can be quite varied, ranging anywhere from very light blue to deeper blue, usually with a beautiful purplish tinge.
