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6ct Multicolor Black Opal 16.5mm x 12.5mm

16.5mm x 12.5mm Black Opal Oval 6ct Black
Black Opal from The Source Black Opal from The Source Black Opal from The Source Click to Enlarge

Guaranteed 100% Natural Gem

Photos above are of Actual Item for Sale
Type: Black Opal
Item ID: 324250
Content: 1 gem
Weight: 6.36 ct
Size: 16.6 mm x 12.59 mm x 5.55 mm
Shape: Oval Cabochon
Clarity: Opaque
Treatment: Smoked
Origin: Ethiopia
Price: USD
Shipping & Handling USD 6.99
Add Matching or Similar Items (2)
Item in Stock
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Compare 2 Similar or Matching Items! Back To Top
ID: 3302141 pc
6 ct Opaque Oval Cabochon Black Opal 16.5mm x 12.5mm
5.63ct Black Opal
16.72mm x 12.59mm x 6.64mm
USD 225.20
Item in Stock
ID: 4009711 pc
16mm x 12.5 Oval Cabochon Black Opal 6ct
6.26ct Black Opal
15.94mm x 12.32mm x 6.59mm
USD 250.40
Item in Stock
This natural Multicolor Black Opal originates from Ethiopia and its weight is about 6 carats. The measurements are 16.6mm x 12.59mm x 5.55mm (length x width x depth). The shape/cut-style of this Black Opal is Oval Cabochon. This 6.36ct Black Opal gem is available to order and can be shipped anywhere in the world.
Shipping Back To Top
  • FedEx or DHL for USD 20.00 only / Delivery 3-4 days / fully insured
  • Registered Mail for USD 6.99 / Delivery 7-14 days / insured for USD 200.00
Payment Options
  • Credit Card
  • PayPal
  • Western Union
  • Bank transfer
Guarantee / Certification
  • All gemstones are natural!
  • All photos and videos are of the actual gem for sale (No Stock Photos)
  • We offer certification from AIGS for USD 30.00 (5-10 additional days)
  • We also offer certification from the BGL lab for USD 15.00 only (3-4 days)
Size and Weight Back To Top
  • Gems are always measured in Millimeter (mm)
    Compare mm Size with US coins
  • Dimensions are given as length x width x depth, except for round stones which are diameter x depth
  • Select gems by size, not by weight! Gem varieties vary in density, so carat weight is not a good indication of size
  • Note: 1ct = 0.2g
Additional Quantities
  • Every item is unique, so you can only order 1 of each item
  • However, we often have similar or matching items. If so, we display them on the same gem detail page
Clarity Explained Back To Top
  • IF = Loupe Clean - Internally flawless; free of inclusions
  • VVS = Almost Loupe Clean - Very, very slight inclusions; inclusions barely seen under 10x magnification
  • VS = Eye Clean - Very slight inclusions; inclusions can be seen under 10x magnification
  • SI = Slightly included - Small inclusions can be seen with the naked eye
  • I1 = Included - Inclusions can be seen with the naked eye
  • Transparent = A gemstone having the property of transmitting light without serious diffusion / may have rutile or other inclusions
  • Translucent = Allowing light to pass through, but not transparent
  • Opaque = Does not allow light to pass through
Return Policy
  • All gems have a 30-day inspection period, which begins on the date of delivery. Gems may be returned for a full refund during this period.
  • Please email us for return authorization code when returning a gem.
  • For more details click here
Treatment Back To Top
Smoke treatment is a relatively old method of stone treatment that has just recently been reinvented. The process involves wrapping opals into silver foil strips and slowly heating them, allowing the buildup of smoke inside the foil. Carbon formed by the smoke, penetrates deep into the opal stone and stains the original color with deeper and darker tones. Smoke treatment is intended to give the opal brighter play of color, because the bright colors contrast better on darker backgrounds. More about treatments
About Black Opal
Black Opal is considered the most valuable of opal varieties. Black Opal contains traces of iron oxide and carbon elements not found in other common opals. These combined elements give black opal the unique color properties it is famed for. Black Opal is mainly found in Lightning Ridge of NSW, Australia. In 2008, New South Wales declared Black Opal as its Official State Gemstone.

Ethiopia is also known to produce treated black opal. The Ethiopian black opal is treated with a smoking process that darkens the color of the opal. The treatment enhances the play of color, rivaling some of Lightning Ridge’s opals. The treated Ethiopian Black Opal is a great value because it sells for much less than Australian Black Opal.

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6ct Multicolor Black Opal 16.5mm x 12.5mm
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