All Kinds of Rocks, Fossils

Almandine Garnet

January Birthstone

JANUARY BIRTHSTONE

Gifts that are made of precious material and symbolizes a person's month of birth in the Gregorian Calendar is called a Birthstone. These precios materials are commonly known as birthday stones and sometimes used as an anniversary gift that is related to the person's age and year of birth.

The garnet is a mineral used since the Bronze Age as abrasives and gemstones. Garnets are sometimes in the shade of red and are also seen in a wide variety of colors. Garnet is derived from the latin "granatus" meaning "grain" and refers to Punica granatum which is a plant having red seeds that is similar in shape, color, and size to some garnet crystals. The Pomegranate is the name of the plant that produces a red fruit with seeds. A jewelry that is made out of garnet has been discovered as early as the Bronze Age, about 3000 bc in burial sites. Garnet is believed to protect the dead in the after life by early communities.

There are six common kinds of garnet and they are named based on the mineral's chemical composition. The six common species are pyrope, spessartite, grossular, almandine, uvarovite, and andradite.

The garnet species are available in many colors including orange, red, blue, purple, green, brown, pink, black, and colorless. The rarest of them all is the blue garnet, which was discovered in the late 1990's in Madagascar. The blue garnet can also be found in some parts of the United States, Turkey and Russia. The Garnet can change color from blue green during daytime to purple in incandescent light because of the presence of a high amount of vanadium. In some instances, their color may change to the shades of gray, brown, green, beige, and blue.

Garnets crystallize in the cubic system, they have three axes that are all equal in length and are perpendicular to each other. They do not show cleavage so they form sharp irregular pieces when exposed to mechanical stress.

The chemical composition of a garnet differenciates and the atomic bonds in some species are stronger than in others. This mineral group has a range of hardness on the Mohs Scale of 6.5 to 7.5. They are used for abrasive purposes.

Garnets are the main mineral when it comes to interpreting the birth of many metamorphic rocks and igneous by using the instrument called as geothermobarometer. Unlike other minerals, diffusion of elements are slower in a garnet. A garnet is very useful in identifying metamorphic facies of rocks. Example, eclogite can be defined as a rock with basalt composition.

Garnet having pure crystals are commonly used as gemstones. The best abrasive and the most common replacement for silica sand used in sand blasting are Garnet sand. If you mix the garnet sand with very high pressure water, the garnet can be an alternative to cut steel and other materials in hydroelectric jets. The Garnet sant can also be used for water filtration.

Garnet is considered as the modern January birthstone and is the gem designated for the 2nd and the 6th wedding anniversary.

In the middle ages, primitive cultures believed that red stones would stop people from bleeding. Early cultures believed that garnets were helpful in preventing and curing blood infections and disorders.

About the Author

For more blogs: http://linkinfreak33.blogspot.com/

Identification And Assessment Of China's Garnet

Identification and assessment of China's Garnet

Means "like a seed." This gem is known around the world long ago, the Egyptian tombs unearthed garnet jewelry in there, many of China's Palace Museum has collections of garnet. Throughout the ages, Garnet was considered to be faith, a symbol of constancy and simplicity, I believe it has the effect of saving lives, and even yellow garnet was considered good medicine for the treatment of jaundice; out who travel china gemstone if accompanied by garnet, can ensure a safe journey , from the breathtaking, so people will start January garnet as the birth of each stone, pray for life journey safely and smoothly.

China's jewelry industry also known as customary for the purple garnet (a) teeth Wu, and Hong Kong and other places according to a transliteration as "AB" Stone.

Identification and assessment of garnet
Identification of garnet

Although one can see the Garnet recognition, but to determine what kind of garnet is not easy, because the complexity of garnet components, including various types. Garnet is composed of two series, consisting of six subspecies of a gemstone series, universal formula is R3M2 (SIO4) 3, R on behalf of divalent elements (calcium, magnesium, iron, manganese), M is trivalent elements (Al, iron, chromium), R and M will form different combinations of different sub-species of garnet, garnet and even some different combinations of garnet mixture.

Although different types of garnet, the color is different refractive index, specific gravity and hardness are also slightly different, but all are so garnet crystal system, a single refractive gems, there is no dichroism and polarizing nature. Remember that the identification of common characteristics of the garnet useful.

Common characteristics of gem garnet and color:

Almandine, brown red; pyrope, red; spessartine, orange and yellow; calcium aluminum garnet, yellow-green; andradite, green; garnet, rose red and Uvarovite , emerald.

As a general appreciation or customers, there is no need to determine the specific species of garnet, as long as you can understand they do is garnet. Similar to the market and garnet gems are not many, mainly ruby, red zircon, spinel, synthesized yttrium aluminum garnet, gadolinium gallium garnet and glass imitation products. Distinction is: red set stone, red has two colors of zircon, red zircon also has a strong double shadow, and garnet is exactly the same, therefore easy to distinguish with china gemstone wholesalerpomegranate; spinel generally lighter in color and detailed identification of use equipment. Colored natural garnet crystals have some flaws or inclusions (such as needle-shaped stone, a number of gas-liquid two-phase inclusions, etc.), and Y. A. G. , G. G. G. And glass is often very clean, or spherical shaped bubble bread crumbs, was strong in the red so the next Chelsea. In fact, for some particular garnet, it also has its own unique characteristics, such as Tsui garnet (andradite green varieties) tend to have "cauda equina-like" fibers of inclusion, with experience at a glance seen.

Identification of key non-multi-color, often a natural body.

Assessment of garnet

Garnet is the general precious stones, but bright green, transparent Zhe Yi is valuable varieties of grain. Evaluation of the most important gem garnet color, the color should be bright pure; followed by higher transparency,

This gem was bright and processed a "fire"; again, fewer defects, style to the United States; the size of the general variety of factors influence the value smaller. Note that, garnet is also a star and cat's eye gem, if color is a good star line or eye liner, while a higher value species.
Evaluation of key Seyan pure crystal clear transparent, less defects.

2. The origin of garnet

The origin of garnet found in the world, including china jewelry supplier former Czechoslovakia, India, Sri Lanka, the United States and the former Soviet Union, Brazil, Africa is well-known origin of garnet. China's Xinjiang, Guangdong, Guangxi also have a large amount of garnet production.
3. Garnet jewelry buying tips

Want to choose a large grain prices should jewelery, garnet is a good choice. Choice of colors red, green, yellow and so on. No matter what color, one should be transparent texture, color, flawless.

About the Author

If you want to know more about China and Chinese jewelry wholesaler, contact the manufacturer of jewelry in China website -. http://www.winbowgems.com Including all jewelry wholesale gemstone wholesale, wholesale handmade jewelry, wholesale cheap jewelry, etc.