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20.9ct Multicolor Boulder Opal

20.9 ct Natural Multicolor Boulder Opal
Boulder Opal from The Source Boulder Opal from The Source Boulder Opal from The Source Click to Enlarge

Guaranteed 100% Natural Gem

Photos above are of Actual Item for Sale
Type: Boulder Opal
Item ID: 321838
Content: 1 gem
Weight: 20.9 ct
Size: 23.48 x 19.55 x 6.06mm
Shape: Pear Cabochon
Clarity: Opaque
Treatment: None
Origin: Australia
Price in USD:
$104.50
Shipping and HandlingShipping & Handling USD 6.99
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Item in Stock
Shipping Back To Top
  • FedEx or DHL for $20.00 only / Delivery 3-4 days / fully insured
  • Registered Mail for $6.99 / Delivery 7-14 days / insured for $200.00
Payment Options
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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 $20.00 only (3-5 additional 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
About Boulder Opal
Boulder Opal is the second most prized form of opal, after black opal. The name derives from the fact that boulder opal is found embedded in ironstone boulders. The opal usually forms as thin veins within these boulders, and most stones are cut to include some of the host ironstone matrix. Boulder opal is sometimes referred to as opal in matrix for this reason. Boulder opal is especially attractive because, like the black opal, it has a dark body tone which adds vibrancy to the play of color. Boulder opal also has a higher density because of the ironstone content, and can be more durable as well.
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20.9ct Boulder Opal
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