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50 Gram Minimum Order
Country:
Tanzania
Model No:
-
FOB Price:
Place of Origin:
-
Price for Minimum Order:
-
Minimum Order Quantity:
50 Gram
Packaging Detail:
-
Delivery Time:
5-10 days
Supplying Ability:
-
Payment Type:
T/T, L/C
Product Group :
Tanzania
Contact Person Hashim
New SABA General Building, 2nd Floor, Room No. 201, Kikuyu/ Livingstone Street, P.O.Box 16819,Arusha
Chrysoprase, chrysophrase or
chrysoprasus is a gemstone variety of chalcedony (a
cryptocrystalline form of silica) that contains small quantities of
nickel. Its color is normally apple-green, but varies to deep
green. The darker varieties of chrysoprase are also referred to as
prase. (However, the term prase is also used to describe
chlorite-included quartz, and to a certain extent is a
color-descriptor, rather than a rigorously defined mineral
variety.)
Chrysoprase is cryptocrystalline, which means that it is composed
of crystals so fine that they cannot be seen as distinct particles
under normal magnification. This sets it apart from rock crystal,
amethyst, citrine, and the other varieties of crystalline quartz.
Other members of the cryptocrystalline silica family include agate,
carnelian, and onyx. Unlike many non-transparent silica minerals,
it is the color of chrysoprase, rather than any pattern of
markings, that makes it desirable. The word chrysoprase comes from
the Greek χρυσός chrysos meaning 'gold' and πράσινον prasinon,
meaning 'green'.
A polished chrysoprase stone
Unlike emerald which owes its green color to the presence of
chromium, the color of chrysoprase is due to trace amounts of
nickel compounds in the form of very small inclusions. The nickel
reportedly occurs as different silicates, like kerolite or pimelite
(not NiO mineral, bunsenite, as was reported before). Chrysoprase
results from the deep weathering or lateritization of nickeliferous
serpentinites or other ultramafic ophiolite rocks. In the
Australian deposits, chrysoprase occurs as veins and nodules with
brown goethite and other iron oxides in the magnesite-rich
saprolite below an iron and silica cap.
Country: | Tanzania |
Model No: | - |
FOB Price: | Get Latest Price |
Place of Origin: | - |
Price for Minimum Order: | - |
Minimum Order Quantity: | 50 Gram |
Packaging Detail: | - |
Delivery Time: | 5-10 days |
Supplying Ability: | - |
Payment Type: | T/T, L/C |
Product Group : | Gemstones |