Opal 2.66ct 10.8×9.2×5.8mm Natural Gemstone Ethiopia

6,650.00 5,320.00


Weight: 2.66ct

Dimension: 10.8×9.2×5.8mm

Origin: Ethiopia

Treatment: None

In stock

SKU: ak163 Category:
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Opal Loose Gemstone 2.66ct 


This Opal is Natural Gemstone Which is White Colour, it’s Originates from Ethiopia and it’s exact weight is 2.66ct, The Measurements are 10.8×9.2×5.8mm, The Shape and Cut of This Stone is Oval Cabochon It’s Graded Transparent and Clarity is Good. This 2.66ct White Natural Opal Gem is available for ready to Ship anywhere in The World. You Can also Select Certification and Shipment Method as Optional.


Summary No ak163
Species Natural Opal
Weight 2.66ct
Shape/cut Oval Cabochon
Colour White
Dimension 10.8×9.2×5.8mm
Clarity Good
Transparency Transparent
Origin Ethiopia
Treatment None

Payment Options

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Credit Card, Debit Card, Amex Card, Bank Transfer and Online Transfer

Shipment Details

International Express Shipping:  Most probably your shipment will reach in 3 to 7 business days Fixed international Express Shipping Charges is $40. Please read our International Orders Policies to understand local custom procedure and duties.

International Standard Shipping: Most probably your shipment will reach in 7 to 45 business days Fixed Standard Shipping Charges is $10. Please read International Orders Policies to understand local custom procedure and duties.

Domestic Express Shipping:  Most probably your shipment will reach in 1 to 3 business days Fixed Domestic Express Courier Charges is Rs 450. (Applicable Only In India) Read Domestic Order Policies

Domestic Standard Shipping: Most probably your shipment will reach in 3 to 7 business days Fixed Standard Courier Charges is Rs 200. (Applicable Only In India) Read Domestic Order Policies


All Gemstones Are Natural!! (If the gem have any treatments we mention in description clearly).

We don’t sell Glass Filled Rubies, Sapphires and also highly treated gemstones.  All the product photos are actual gemstone photos.

If you are not satisfied with our product you can get money back return in 10 Days without any hassle. Read Our Return Policies


All Product Get standard GemFame Gemstone Report along with your orders. If you want a certificate for registered Lab, We also provide additional gemstones certificate from NGL (National Gem Lab) which is located in India is chargeable. Read More

Additional Quantities

Every gem has it’s own unique quality, Size, weight & colour so you can get only 1 quantity in each item.

Opal Loose Gemstone 2.66ct

Properties Of Opal 

Chemical Composition:  SiO2 + 5-10% nH2O [Hydrated Silicon Dioxide]

Hardness: 5.5 – 6.0

Specific Gravity (Density): 1.90 – 2.30

Refractive Index: 1.43

About: Opal Loose Gemstone

Opal gets its name from Opalus, the ancient Latin name which was probably derived from the Sanskrit word upala, meaning precious stone. The Greek word opallios literally means “to see a change of colour.”

Opal comes in a wide variety of types and colours from many locations world wide. Opal has almost as many names as locations. Some Opal names are in reference to their locality such as Lightning Ridge, Coober Pedy and Virgin Valley. Other names are due to their colour or type such as Cherry, Common, Girasol, Hyalite, Water, Fire, Jelly, Milk, Black, Crystal, Hydrophane, Moss and Harlequin. Many Opals are transparent but others are only known to be opaque and are made into beautiful cabochons with amazing colour play like Australian Opals. Australian Opal cabochons can have translucent to opaque white, grey or black body colours with beautiful colour play on their surface.

Transparent opals may have solid body colors with no color play or they may be lightly colored or colorless but show beautiful internal color play with all the colors of a rainbow. These may be called Contra Luz or Precious Opal because of their amazing internal color play when lighted from behind. Some Opals from Ethiopia have both strong body colors and beautiful internal color play. Faceted Brazilian and Mexican Opals are usually found in vivid colors of yellow, orange and red. They are often called Fire Opals for their body colors resembling the colors of fire, not due to internal fire or color play. Colorless Opals are often called Jelly, Water, Crystal, Girasol or Hyalite Opal. Hyalite Opal from Madagascar is colorless with a soft, beautiful glow. There are also opaque Opals with no color play just beautiful pastel colors like pink Opal from Peru; blue Opal from Owyhee, Oregon; and pale green Opal from Siberia and Africa. The USA has several locations known for beautiful Opals including Idaho, Oregon and Nevada.

Although Opal is amorphous (no crystal structure) it does have a structure of sorts. Opal is composed of tiny spherical particles as a solidified gel also containing 5-10% water. Random chains of silicon dioxide and water are arranged into tiny spheres. In most Opals these spheres are irregular in size and concentration, kind of jumbled. But in Opals with colour play, such as Contra-luz or Precious Opal, there are many pockets of spheres that are of approximately equal size and have a regular concentration, or structure. The water contained in these pockets of somewhat organised structure has the effect of diffracting light at various wavelengths creating a display of different colours. This effect is similar to when a rainbow is created from the sun shining through water particles in the air. Each pocket may produce a different colour or different intensity of colour depending on their angle in the composition and the angle at which the gem is viewed. This effect creates the beautiful colour play or opalescence that makes some Opals much more valuable than others.

Since Opal contains water, it may also dehydrate causing it to craze, crack or become very cloudy or even opaque. This may happen as soon as it is removed from the ground or years later. When this happens, a beautiful Opal may become ugly and worthless.

Of all the Opal taken out of the ground, 95% is valueless “potch” and 95% of the remainder is low quality. Only a mere 0.25% ever makes it to market as a gem.







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