Opals
Gemstones
Jewelry
Coins
Published at 8th May 2018
Modified at 4th Jan 2023
Tanzanian Green Opal
Archeological evidence suggests that opals were mined in Africa, in the area today known as Kenya as far back as 4,000 years BC. Those ancient peoples used Opals to make tools.
Honey Opal and Green Opal are both found in Tanzania and posses stunning rolling-fire flashes. They are all referred to as Tanzanian Opal. Green Opal is similar to Jade and is also known as Prase Opal. There is also some Dendritic Opal found which is moss like inclusions that have formed in the Opal.
Holistic Values of Green Opal
Green Opal especially Prase Opal is said to be useful to attract money and prosperity. it is also said to be good for the eyes. This Opal is popular for protecting its wearer against stress and balances blood pressure.
Physical Properties
Chemical Composition: SiO2
Chemical Formula: SiO2+ H2O
Crystal System: Amorphous
Specific Gravity: 1.98 - 2.25
Moh’s Resistance: 5 - 6.5
Refractive Index: 1.370 - 1.470
Fracture: Conchoidal
Firmness: Brittle
Lustre: Vitreous
Cleavage Quality: None
Optical Nature: Isotropic
Colour: Apple-green
Where is Tanzanian Green Opal Found?
Tanzanian green Opals usually feature in freshly uncovered veins on Mount Iyobo along central Tanzania. One of these Opals is referred as “Prase Opal”, which consist of a nickel variety, with chromophores that enlightens the neon bluish-green colour. These kinds of opals are quite similar with the look, which can be separated easily by varying SG and RI, as well.
Both varieties compromise from low-grade solid material into high-quality transparent gemstones. Prase green Opal has the tendency to be more transparent and gemmy. These opals have been recently obtained by stone devotee, especially the mesmerizing Prase Opal rough.
These two Opals have been mined on Lyobo Mountain, which is situated in central Tanzania for more than 20 years, with the primary accounts being illustrated by Gübelin since 1975. The latest discovery exposed some of the most strong and attractive blue-green material to be perceived by the jewel trade.
Tanzanian Prase Opal
Tanzanian Prase Opal is an electric-green type of Opal with trace amounts of Nickel minerals. It is quite similar to the colour of Chrysoprase and it can be discovered in the same places in the world. Prase Opal is also referred to as African Jade because of its attractive green colour. This opal has been used as jewel materials for millions of years.
Shop For Green Opal
Search the Opal Encyclopedia
Related Auctions
Related Articles
Australian Black Opal is one of the rarest gemstones on earth. It has every color of the rainbow on a black ground which makes the colors dance.
8th May 2018
Boulder Opal is one of the most undervalue opals valuable on the market. Learn more about this unique opal and browse the beautifully stones we have for sale.
29th May 2019
With a passion for opals, Wayne and Estella Sedawie established Opal Plus more that 14 years ago and have found the internet to be a valuable tool. It’s where most of the company’s international transactions take place.
17th Oct 2018
Latest Articles
An opal’s price comes down to a variety of factors, all of which we’ve broken down in this guide to opal grading and prices. Learn all about opal grading and the prices of each type of opal!
19th Jul 2023
Come on a journey and learn about the healing power of opals from our guest writer Vivien Schapera from Crystal Healing Techniques!
20th May 2023
The Flame (or Fire) Queen opal is the world’s most expensive opal, sold for the modern equivalent of $3 million dollars. Learn all about its history and qualities!
18th Feb 2023
Article Categories
All there is to know about Opals including Black Opals, Ethiopian Opals & Boulder Opal
15 Articles
Check out our fascinating information and articles on all things amazing in the Opal world
43 Articles
Opal Auctions sellers who are approved as opal Verified Sellers
4 Articles