Posts

Showing posts with the label gem testing laboratory

facts that why you love green emerald gemstone

Image
 facts that why you love green emerald gemstone BASIC CRYSTALLOGRAPHY All  gemstones   can be classified as either: AMORPHOUS No orderly internal atomic structure. No naturally-occurring characteristic shape. Products of rapid cooling. Physical properties are constant in all directions. CRYSTALLINE Definite & regular internal atomic structure. Geometrical external forms. Directional properties. Products of slow cooling. Identical in all crystals of a given species. Gemstones can also be: MASSIVE A term used to describe a crystalline substance that does not have a naturally-occurring characteristic shape. (i.e. Rose Quartz) CRYPTO-CRYSTALLINE This type of material has not grown as a single crystal but as an aggregate of small or microscopic crystals randomly orientated within the body of the gem. These gems are usually semi-translucent or opaque and slightly porous. Although all crypto-crystalline gems are massive, it should be noted that not all massive materials...

Gemstone Certification: Important Factors That You Have To Know

Image
  Not all gemstones need certification, especially if they are not  natural gemstones . If you know that you are buying lab-grown gemstones, why invest in a gemstone certification? However, if you are unsure of what the seller is trying to sell you, without any certification, ensure that you get it certified from a gemologist. Best still, send it across to a gemological institute for authentication. Gem certification  is a document issued by the licensed gemological laboratory, which defines the various internal and external characteristics of a gem or a diamond. Some certificates verify authenticity and weight, some specify color and clarity grades, which might also include identifying marks and a map of the stone. There are other documents that show if the stone has been treated with laser or is of natural origin. Gemstone Certification Makes You A Smart Buyer It must be remembered that natural, untreated stone is far more valuable than the treated stone because the for...