Boulder Opal Roundal
Late 20th Century Unknown Cocktail Rings
Opal, Sapphire, Sterling Silver
Late 20th Century Contemporary Pendant Necklaces
Diamond, Opal, 18k Gold
21st Century and Contemporary Fashion Rings
Diamond, White Diamond, Opal, 18k Gold, Yellow Gold
21st Century and Contemporary More Rings
Opal, Sapphire, Sterling Silver
20th Century Fashion Rings
Diamond, Opal, 18k Gold, Yellow Gold
2010s Thai Contemporary Pendant Necklaces
Garnet, Opal, Tsavorite, Silver
21st Century and Contemporary American Fashion Rings
Diamond, Opal, Platinum
21st Century and Contemporary American Fashion Rings
Diamond, Opal, Platinum
21st Century and Contemporary American Pendant Necklaces
Diamond, Opal, Platinum
21st Century and Contemporary American Cocktail Rings
Diamond, Opal, Platinum
21st Century and Contemporary American Pendant Necklaces
Diamond, Opal, Gold, 18k Gold
2010s Thai Contemporary Necklace Enhancers
Diamond, Opal, 18k Gold, Yellow Gold
21st Century and Contemporary North American Pendant Necklaces
Diamond, Opal, Platinum
21st Century and Contemporary Italian Contemporary Cufflinks
Opal, Ruby, 18k Gold, White Gold
2010s American Contemporary Necklace Enhancers
Diamond, Opal, 18k Gold, Yellow Gold
21st Century and Contemporary American Cocktail Rings
Diamond, Opal, Platinum
21st Century and Contemporary American Pendant Necklaces
Diamond, Opal, Gold, 18k Gold, Platinum
Vintage 1970s American Retro Pendant Necklaces
Diamond, Opal, 14k Gold, Yellow Gold, Gold
21st Century and Contemporary Brooches
Diamond, Opal, Platinum
21st Century and Contemporary American Cocktail Rings
Diamond, Opal, Gold, 18k Gold, Yellow Gold, Platinum
21st Century and Contemporary American Pendant Necklaces
Diamond, Opal, Platinum
Late 20th Century Japanese Cocktail Rings
Diamond, Opal, Platinum
2010s American Contemporary Stud Earrings
Diamond, Opal, 18k Gold, Yellow Gold
21st Century and Contemporary Contemporary Fashion Rings
Diamond, Opal, 18k Gold, Gold
21st Century and Contemporary Contemporary Fashion Rings
Diamond, Opal, Gold, 18k Gold
Late 20th Century Modern Pendant Necklaces
Diamond, Opal, Pink Sapphire, Platinum
Vintage 1970s American Art Deco Brooches
Diamond, Opal, Black Opal, Yellow Gold
20th Century Brooches
Diamond, White Diamond, Opal, 18k Gold, Yellow Gold
Vintage 1980s Unknown Retro Pendant Necklaces
Diamond, Opal, Gold, White Gold
21st Century and Contemporary American Brooches
Diamond, Opal, Gold, 18k Gold, Yellow Gold, Platinum
2010s Thai Contemporary Pendant Necklaces
Garnet, Opal, Sapphire, Silver
21st Century and Contemporary Necklace Enhancers
Diamond, Opal, Tourmaline, Gold, 14k Gold, Yellow Gold
20th Century Engagement Rings
White Diamond, Opal, Gold, 18k Gold, Platinum
Late 20th Century Australian Contemporary Pendant Necklaces
Diamond, Opal, 18k Gold, Yellow Gold, Platinum
21st Century and Contemporary Italian Contemporary Pendant Necklaces
Opal, 18k Gold, Rose Gold
21st Century and Contemporary Pendant Necklaces
Diamond, Emerald, Opal, Gold, 14k Gold, Yellow Gold
Vintage 1970s American Art Deco Brooches
Diamond, Opal, 18k Gold, Yellow Gold
20th Century Neoclassical Engagement Rings
Opal, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary American Contemporary Drop Earrings
Aquamarine, Diamond, Opal, Gold, 18k Gold
2010s Australian Art Deco Cocktail Rings
Diamond, Opal, 14k Gold, Yellow Gold
21st Century and Contemporary American Modern Pendant Necklaces
Diamond, Opal, 18k Gold
1990s American Cocktail Rings
Diamond, Opal, Yellow Gold, Platinum
Mid-20th Century Unknown Modern Drop Earrings
Opal, Zircon, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary Pendant Necklaces
Diamond, Opal, Ruby, Gold, 18k Gold, Yellow Gold
21st Century and Contemporary American Fashion Rings
Diamond, Opal, 18k Gold, White Gold
Vintage 1970s German Drop Necklaces
Diamond, Opal, Sapphire, 18k Gold, Yellow Gold, 14k Gold
21st Century and Contemporary Modern Brooches
Opal, Pearl, Gold, 18k Gold, Yellow Gold
Vintage 1980s Unknown Modern Engagement Rings
Diamond, Opal, Gold, 9k Gold, Yellow Gold
2010s Australian Loose Gemstones
Opal, Black Opal
Vintage 1970s American Art Deco Brooches
Crystal, Diamond, Opal, Yellow Gold
Vintage 1970s American Art Deco Brooches
Diamond, Opal, Sapphire, 18k Gold, Yellow Gold
21st Century and Contemporary Brooches
Diamond, Opal, 18k Gold, Yellow Gold, Platinum
Late 20th Century Unknown Modern Pendant Necklaces
Diamond, Aquamarine, Opal, 14k Gold, Yellow Gold, 18k Gold, White Gold
21st Century and Contemporary American Modern Dangle Earrings
Tourmaline, Blue Sapphire, Opal, Diamond, Coral, Yellow Gold, 18k Gold
21st Century and Contemporary American Modern Fashion Rings
Diamond, Opal, 14k Gold, Yellow Gold
2010s Russian Contemporary Brooches
Diamond, Opal, Cultured Pearl, 18k Gold
21st Century and Contemporary Vietnamese Contemporary Stud Earrings
Opal, 18k Gold
Vintage 1970s American Art Deco Brooches
Opal, Black Opal, 18k Gold, Yellow Gold
21st Century and Contemporary British Contemporary Drop Earrings
Diamond, White Diamond, Opal, Gold, 18k Gold, White Gold, Rhodium
20th Century British Modernist Cluster Rings
Diamond, Opal, Gold, 18k Gold, White Gold
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Boulder Opal Roundal For Sale on 1stDibs
How Much is a Boulder Opal Roundal?
- 1stDibs ExpertAugust 17, 2021An Australian boulder opal is an opal mined from a large ironstone boulder under the ground. This type of opal is the second most valuable opal behind the black opal. Spot an Australian boulder opal by checking for a solid layer of brown ironstone left on the back of the stone. Shop Australian boulder opals on 1stDibs.