Archive for November, 2009

Cognac Quartz

Monday, November 30th, 2009 at 1:46 am

Cognac Quartz

Gemstones come in many shapes, colors and sizes. They are naturally occurring crystalline forms of certain minerals. Precious and semiprecious stones used in jewelry making is specially cut and polished. Some beautiful stone is also used to make attractive jewelry items, but they are not considered precious stones. The value of a stone is determined by a few factors, including its hardness, luster and rarity. Many stones are naturally transparent, but recordings of fibrous minerals sometimes make them opaque. The value of diamonds is not measured in the same way. Almost all stones graded using the naked eye, with the exception of diamond.

Gems are classified as precious and valuable. Pearl regarded as a gem in addition to diamond, ruby, sapphire, opal and emerald. Other stones like peridot, garnet, cat's eye and some other commonly used in jewelry making. Some stones are very rare, for example, black opal, apophyllite, epidote, fluorite, rhodizite, etc. These stones are expensive because they are rarely found. Rhodizite is a light yellow stone from Madagascar and is available for $ 500/carat which is quite expensive. Rarity is one of the most desired qualities of stone.

Gemstones identified by their chemical composition. The same bead can exhibit different colors because of the addition of impurities, but the basic chemical composition changed not. They also differ in their color and hardness based on the place from which they are produced. For example, emerald occurs in various shades of green. Some emeralds also exhibits bluish tint due to the addition of some elements such as chromium. It is also known as a series of beryl, which is an abbreviation of beryllium aluminum silicate. Aquamarine and Morganite are also varieties of this mineral. Beryl exhibits a six-sided or hexagonal crystal form and its transparency ranges from transparent to opaque.

Mineral quartz are also so many varieties, including amethyst, Rose Quartz, chalcedony and citrine. It comes in white, purple and brown colors. It is also known as silicon dioxide or quartz. Rose quartz is very beautiful and is often used to make attractive modern jewelry items for women. Addition of titanium and iron to silica intermediary pale pink color this mineral. Many Gemstones occur as varieties of chalcedony including agate, carnelian, heliotrope, and Chrysoprase. Agate is further categorized as pure agate, moss agate and onyx. Heliotrope is also known as bloodstone and regarded as a mysterious Birthstone for March.

Some organic materials are also considered gemstones, such as amber. Amber is a resin and acting in a beautiful yellow or orange color. It was used as a decorative element in antiquity. Handmade amber jewelry is still highly appreciated in all parts of the world. Cognac amber rings are exchanged information of obligations as tokens of love and commitment. Antique amber rings and pendants are also very popular. You can find such a counterpart to as low as $ 34, which is quite reasonable. Amber is often combined with other stones and crystals to enhance its beauty and strength.

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