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Amethyst Qualities and Sources

Monday, January 28, 2013 10:40:59 AM America/Los_Angeles

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Amethyst

Amethyst is the violet to purple form of quartz.  Quartz is the most common mineral in the earths crust.  As common as the mineral quartz is, the finest amethyst commonly known as “Siberian color” is quite rare.  This color is the color of concord grapes with a secondary red flash when viewed in incandescent lighting.  The top colors will exhibit this secondary red or blue flashes of co...

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Posted in Education By Steve Moriarty

Care of Filled Diamonds and Rubies

Saturday, January 19, 2013 6:37:38 AM America/Los_Angeles

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Diamonds and rubies can be filled with a glass-like substance that improves the clarity. Diamond filling goes under the name of its developer "Yehuda" and under trade names such as "Oved". During the last decade a huge amount of rubies particularly from Madagascar have been filled by a similar process. Identifying these stones is difficult for the novice and jeweler alike. For the novice idenyi...

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Posted in Education By Steve Moriarty

Colored Gemstone Clarity Grading Scale

Wednesday, January 16, 2013 4:10:16 PM America/Los_Angeles

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Grading Scale for the Clarity in Colored Gems

The value of colored gems is based on the 4 Cs of color, carat weight, cut and clarity. Clarity related to price is not quite as critical in color as it is in diamonds. It is important that colored stones are eye clean. Eye visible inclusions have a significant deduction on the value while stones above VS clarity do not generally increase in value ...

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Posted in Education By Steve Moriarty
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