Boulder opal
Boulder opal for sale on Ireland's largest auction and classifieds sites
Vintage fine silver - vintage, natural - £80.00
Front side opal • Good condition you • Can see from - Free postage - New and Used
Front side opal • Good condition you • Can see from - Free postage - New and Used
Cts koroit crystal - crystal, opal - £68.30
Beautiful koroit boulder • Opal rough deep • Blue hues dimensions - Free postage - New and Used
Beautiful koroit boulder • Opal rough deep • Blue hues dimensions - Free postage - New and Used
Natural australian boulder - australian, - £33.46
Boulder opal rough • This natural australian • Stunning gemstone known - Free postage - New and Used
Boulder opal rough • This natural australian • Stunning gemstone known - Free postage - New and Used
Boulder opal rough - boulder, - £30.52
This product stunning • Piece natural australian • Boulder opal rough - Free postage - New and Used
This product stunning • Piece natural australian • Boulder opal rough - Free postage - New and Used
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Australian boulder opal - ct, - £32.50
Boulder opal • Ring 14k yellow • Gold over sterling - Free postage - New and Used
Boulder opal • Ring 14k yellow • Gold over sterling - Free postage - New and Used
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48 listings · from £13.9 · avg £99.4
Browse 48 boulder opal listings currently in our index. Prices range from £13.9 to £445, with an average of £99.4. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about boulder opal →
Carats winton boulder - winton, - £47.50
5.10 carats winton • Boulder opal rough • Dimensions 21.47 15.16 - Free postage - New and Used
5.10 carats winton • Boulder opal rough • Dimensions 21.47 15.16 - Free postage - New and Used
Natural solid australian - solid, - £55.26
Natural solid australian • Boulder opal weight • 8.6 this stone - Free postage - New and Used
Natural solid australian • Boulder opal weight • 8.6 this stone - Free postage - New and Used
Carats boulder opal - boulder, - £99.50
2.32 carats boulder • Opal cut stone • Dimensions 11.99 7.39 - Free postage - New and Used
2.32 carats boulder • Opal cut stone • Dimensions 11.99 7.39 - Free postage - New and Used
Natural solid australian - solid, old - £85.00
Australian boulder opal • Its origin card • Measures approximately 2cm - Free postage - New and Used
Australian boulder opal • Its origin card • Measures approximately 2cm - Free postage - New and Used
28cts australian boulder rough - 28cts, - £14.97
28cts watch video • Clearer look stone - Free postage - New and Used
28cts watch video • Clearer look stone - Free postage - New and Used
Gemporia silver and boulder - £24.99
Gemporia silver boulder • Opal ring new • Tag - Free postage - New and Used
Gemporia silver boulder • Opal ring new • Tag - Free postage - New and Used
Sterling silver and boulder - sterling, - £31.89
Stunning pendant from • Masterpiece jewellery australia • Made sterling silver - Free postage - New and Used
Stunning pendant from • Masterpiece jewellery australia • Made sterling silver - Free postage - New and Used
6ct boulder matrix - 21.6ct, - £62.05
Boulder matrix opal • Source yowah australia • Untreated natural real - Free postage - New and Used
Boulder matrix opal • Source yowah australia • Untreated natural real - Free postage - New and Used
Australian natural yowah nut - yowah, - £75.18
Experience natural beauty • Australian yowah nut • Boulder opal true - Free postage - New and Used
Experience natural beauty • Australian yowah nut • Boulder opal true - Free postage - New and Used
Boulder opal loose vintage - boulder, - £78.70
Bought collection gemstones • Few years ago • This lovely australian - Free postage - New and Used
Bought collection gemstones • Few years ago • This lovely australian - Free postage - New and Used
Rare australian pipe boulder - rare, - £304.99
Truly magical high • Grade solid australian • Pipe opal set - Free postage - New and Used
Truly magical high • Grade solid australian • Pipe opal set - Free postage - New and Used
Grams australian boulder - grams, - £47.50
Under gram rough • Australian boulder opal • Amazing colour through - Free postage - New and Used
Under gram rough • Australian boulder opal • Amazing colour through - Free postage - New and Used
90cts australian boulder rough - australian, - £14.97
90cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
90cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
21cts australian boulder - australian, rough - £13.90
21cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
21cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
Boulder opal 48ct set - opal, 29.48ct - £53.27
Natural solid boulder • Origin winton queensland • Australia details no8173k - Free postage - New and Used
Natural solid boulder • Origin winton queensland • Australia details no8173k - Free postage - New and Used
Vintage sterling silver - vintage, - £37.10
Vintage sterling silver • Mexican boulder fire • Opal pendant beautiful - Free postage - New and Used
Vintage sterling silver • Mexican boulder fire • Opal pendant beautiful - Free postage - New and Used
25cts australian boulder rough - australian, - £18.18
25cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
25cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
Natural solid australian - solid, - £146.30
Weight 20.80 this • Stone 100 natural • Untreated origin queenslend - Free postage - New and Used
Weight 20.80 this • Stone 100 natural • Untreated origin queenslend - Free postage - New and Used
8ct boulder matrix opal - 41.8ct, - £92.76
Boulder matrix opal • Untreated natural real • Gemstone only found - Free postage - New and Used
Boulder matrix opal • Untreated natural real • Gemstone only found - Free postage - New and Used
33cts australian boulder rough - boulder, - £13.96
33cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
33cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
Natural solid australian - natural, - £207.45
Weight 32.3 this • Stone 100 natural • Untreated - Free postage - New and Used
Weight 32.3 this • Stone 100 natural • Untreated - Free postage - New and Used
Sterling silver 2ct - silver, 8.2ct - £31.49
Gorgeous sterling silver • Australian boulder opal • From opalton queensland - Free postage - New and Used
Gorgeous sterling silver • Australian boulder opal • From opalton queensland - Free postage - New and Used
Natural solid australian - natural, - £99.50
Weight 11.42 this • Stone 100 natural • Untreated origin queenslend - Free postage - New and Used
Weight 11.42 this • Stone 100 natural • Untreated origin queenslend - Free postage - New and Used
Australian natural queensland - australian, - £336.86
This australian natural • Queensland solid boulder • Opal silver 925 - Free postage - New and Used
This australian natural • Queensland solid boulder • Opal silver 925 - Free postage - New and Used
Boulder opal pendant - boulder, - £73.50
This boulder opal • Pendant stunning piece • Crafted natural multicoloured - Free postage - New and Used
This boulder opal • Pendant stunning piece • Crafted natural multicoloured - Free postage - New and Used
Winton blue boulder opal rub - boulder, - £140.00
Dimensions 2mm weight • Cts winton blue • Boulder opal truly - Free postage - New and Used
Dimensions 2mm weight • Cts winton blue • Boulder opal truly - Free postage - New and Used
Australian natural queensland - natural, - £365.07
This australian natural • Queensland solid boulder • Opal silver 925 - Free postage - New and Used
This australian natural • Queensland solid boulder • Opal silver 925 - Free postage - New and Used
Natural australian queensland - australian, - £63.10
Location australia queensland • Stone natural boulder • Opal cut freeform - Free postage - New and Used
Location australia queensland • Stone natural boulder • Opal cut freeform - Free postage - New and Used
Australian painted lady - australian, - £115.10
Handmade painted lady • Boulder opal bangle • 925 sterling silver - Free postage - New and Used
Handmade painted lady • Boulder opal bangle • 925 sterling silver - Free postage - New and Used
Large polished koroit - polished, - £223.53
Weight 250cts source • Koroit opal field • Queensland australia untreated - Free postage - New and Used
Weight 250cts source • Koroit opal field • Queensland australia untreated - Free postage - New and Used
Red flashes australian - red, flashes! - £208.70
Red flashes australian • Boulder opal bangle • 925 sterling silver - Free postage - New and Used
Red flashes australian • Boulder opal bangle • 925 sterling silver - Free postage - New and Used
Queensland boulder opal - queensland, - £104.70
Queensland boulder opal • Resin initial handmade • Personalised letter carefully - Free postage - New and Used
Queensland boulder opal • Resin initial handmade • Personalised letter carefully - Free postage - New and Used
142cts australian boulder - 142cts, - £21.45
142cts total all • Pieces - Free postage - New and Used
142cts total all • Pieces - Free postage - New and Used
Boulder opal pendant stone - boulder, - £23.69
This boulder opal • Pendant stone stunning • Piece gemstone jewellery - Free postage - New and Used
This boulder opal • Pendant stone stunning • Piece gemstone jewellery - Free postage - New and Used
Opal ring adjustable - ring, natural - £242.86
Rare opportunity own • Beautiful natural queensland • Boulder opal ring - Free postage - New and Used
Rare opportunity own • Beautiful natural queensland • Boulder opal ring - Free postage - New and Used
85cts australian boulder - australian, rough - £18.18
85cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
85cts australian boulder • Rough opal stone • Gamble ready shape - Free postage - New and Used
14k white gold boulder - 14k, - £445.00
Blue boulder opal • 14k white gold • This stunning necklace - Free postage - New and Used
Blue boulder opal • 14k white gold • This stunning necklace - Free postage - New and Used
Natural solid australian - natural, - £229.92
Natural solid australian • Matrix boulder opal • Weight 36.4 this - Free postage - New and Used
Natural solid australian • Matrix boulder opal • Weight 36.4 this - Free postage - New and Used
35ct australia koroit - 55.35ct, - £72.72
Origin koroit queensland • Australia gem type • Natural boulder opal - Free postage - New and Used
Origin koroit queensland • Australia gem type • Natural boulder opal - Free postage - New and Used
Koroit queensland boulder - , - £56.37
Hand mined near • Cunnamulla from koroit • Opal fields queensland - Free postage - New and Used
Hand mined near • Cunnamulla from koroit • Opal fields queensland - Free postage - New and Used
Australian boulder opal 31ct - australian, - £94.01
Australian boulder opal • Free form triangle • Stone mixed flashes - Free postage - New and Used
Australian boulder opal • Free form triangle • Stone mixed flashes - Free postage - New and Used
Boulder opal doublet heart - boulder, - £14.96
Stone opal shape • Clarity eye clean • Style loose natural - Free postage - New and Used
Stone opal shape • Clarity eye clean • Style loose natural - Free postage - New and Used
Boulder opal gemstone pendant - opal, - £20.43
This boulder opal • Gemstone pendant stunning • Piece handmade jewellery - Free postage - New and Used
This boulder opal • Gemstone pendant stunning • Piece handmade jewellery - Free postage - New and Used
Try this: brazilian opal | ceylon sapphire | colombian emeralds | doublets | emerald stone | garnet stone | gems stones | loose black diamonds | loose opals | melee diamonds
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Everything you need to know about boulder opal
Whether you are looking for a brand-new or second-hand boulder opal, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £13.9, while premium listings can reach £445 — giving you a wide budget spread to work with. The average price of £99.4 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.