Availability:
Andradite is one of the most sought after and valuable varieties of Garnet, but
unfortunately there are no major sources of this gem and supplies are limited to
small deposits. The sub-variety of Andradite known as Demantoid enjoys continuously
high levels of demand.
Sources:
There are known deposits of Andradite in the Democratic Republic of Congo, Iran,
Italy, Kenya, Korea, Mexico, Namibia, Russia, South Africa, Switzerland, and the
United States.
Evaluation:
Andradite Garnet is rated at a 6.5 to 7.5 on Moh's Scale of Hardness. Though generally
hard, they are rare and should therefore be treated with as much care as possible
so as to avoid damage. Andradite can be broken down into three recognizable sub
varieties. There is the yellowish-green variety known as Topazolite, the emerald
green variety known as Demantoid, and the black to dark red variety known as Melantite.
Demantoid is not only
the rarest of the Andradite family, but the most valuable
of the extensive Garnet family as a whole. Topazolite rarely occurs in sizes large
enough to be faceted and Melantite is occasionally used as a mourning stone, but
rarely used for jewelry purposes.
Andradite is the most lustrous Garnet variety and it's light dispersion is even
greater then that of the diamond. This dispersion can often be masked by dark overtones,
particularly in larger stones, but small lighter stones almost always display stunning
brilliance and fire.
Common Cuts:
Andradites are usually found in Round Brilliant or Cushion Cuts because these cuts
best allow this gemstone to exhibit its fantastic brilliance and fire.
Routine Enhancements:
There are no known enhancements for Andradite.
Care & Cleaning:
Andradite Garnet can be cleaned using warm, soapy water and a soft brush. Ultrasonic
cleaners should never be used for Andradite Garnet, which should also be kept away
from chemicals that may cause it to erode. Garnet should also be kept away from
drastic temperature changes as this may cause fracturing.
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