Sub Categories

• Boulder Matrix Rough (233)
• Boulder Opal Specimens (80)
• Boulder wood Fossil rough (42)
• Jundah Opal Rough (37)
• Parcels Boulder Rough Opal (59)

About Boulder Opal Rough

Boulder rough opal sellers take picture of the boulder rough dipped in water so the image will expose the colours of the stone as if it was polished. Buyer will receive the boulder or Koroit opal rough in a dry condition.

Boulder opal Rough is mined in Queensland Australia.

It is formed as veins in ironstone. Ironstone is the deep brown potch like stone that is very strong.

Most popular opal mining towns are Quilpie and Winton and many old fields like Jundah or Hammonds mine still produce opal.

Boulder opal mining is capital expensive with large bulldozers and excavators..D9 bulldozers are common and some fields now have D12s as these dozers sometimes have to level off mountain tops to get to the opal and need large strong rippers to break open the ground. the miner will block out the rough opal and when he sees vein of opal colour he will hold against thin saw blade to place nick in the colour and the piece will break open evenly exposing opal colour, sometimes good colour sometimes very little colour

Source your Boulder opal rough direct from opal miners and opal wholesalers and dealers for your single gem opal boulder rough or parcel rough boulder opals from Quilpie or Winton Australia The boulder opal miners hold their annual opal show in Winton in 1st week July. Boulder opal is unique only to Queensland. It only occurs in deposits in weathered sedimentary Cretaceous rocks in the west of the state of Qld.Jundah Opal rough is also located in central Queensland opal fields.

The Term Matrix opal is where the opal occurs as a network of veins or infilling of voids or between grains of the host rock (ferruginous sandstone or ironstone) Opalised wood and pipe opal is occasionally found also Large opal mines often have several bulldozers over large opal leases and partake in extensive exploration for new opal mining fields

Good Boulder or Koroit opal rough should only be cut by Opal professionals as the chance of new opal cutter rubbing good  opal colour away is high. we suggest new opal  cutters get good lapidary equipment and practise on smaller parcels before cutting good boulder  opal rough .Source your Boulder  rough singe opals direct from opal miners and opal wholesalers and dealers for your single rough gem opal from Queensland  Australia. Boulder rough can have thin colours on top of ironstone so opal cutter must be very gentle in polishing these thin colour bars or color will be rubbed off. For new opal cutters it is recommended to cut matrix or Koroit rough before attempting thin color bar veins in boulder opals, as ,many boulder opal specimens have thin colour bars.

Most opal miners will exchange parcel  boulder rough opal  or single rough boulder if buyer is not satisfied with parcel but if buyer snips or works and opal the parcel is yours and cannot be returned.

Opal miners ,opal suppliers and opal wholesalers offer boulder rough opal direct from boulder  opal mine or boulder opal cutters factory but opal mines stop work before xmas and some in November as temperature is too hot and working conditions are hot and dusty, some boulder  opal miners do not start work till April so always plan ahead if you need  boulder opal rough to cut and polish boulder  potch is good to trial to see how good your polish is before polishing  good quality opal rough. Bolder opal rough is also formed as veins in bedrock ironstone so once rough is faced a small nick from saw blade will force to rock to split open on this slit line and form two matching splits. Sometimes these splits are perfect and two matching opal earrings can be made from this boulder split.

Boulder Opal Rough

• 

  $10 Shipping For 5...
  HomereO... $10.00 USD

• 

  Boulder Rough Opal...
  dreamti... $40.00 USD

• 

  Parcel Deal Very O...
  SEDA RO... $32.00 USD

	BOULDER OPAL ROUGH 6.90 CTS SFJ 1834 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$69.00 USD View / Buy This Item
	BARGAIN FACED BOULDER OPAL RUB READY TO POLISH 18.90 CTS 25 x 15 x 5mm AUSTRALIANROUGHOPAL	- 2 days 10 hours	$6.00 USD View / Buy This Item
	BOULDER OPAL ROUGH 4.20 CTS SFJ 1846 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$59.00 USD View / Buy This Item
	EARTHQUAKE BOULDER ROUGH RUB 146 CARATS GTT 938 Gem traders	- 2 days 10 hours	$23.00 USD View / Buy This Item
	BOULDER ROUGH FROM QUILPIE 18.9 CTS [BY330 ] SEDA ROUGH OPALS	- 2 days 10 hours	$34.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW-- 40.55 CTS [BY2092] SEDA ROUGH OPALS	- 2 days 10 hours	$23.00 USD View / Buy This Item
	BOULDER ROUGH FROM THE HAYRICKS MINE 4.9CTS [BMA112 ] BOULDER MAGIC	- 2 days 10 hours	$17.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW -- 23.85 CTS [BY2073] SEDA ROUGH OPALS	- 2 days 10 hours	$16.00 USD View / Buy This Item
	BOULDER ROUGH FROM QUILPIE 14.4 CTS [BY323 ] SEDA ROUGH OPALS	- 2 days 10 hours	$25.00 USD View / Buy This Item
	SEA BLUE VEINS BOULDER OPAL ROUGH 11 CTS MM 1890 21 x 16 x 5mm opalmania	- 2 days 10 hours	$28.00 USD View / Buy This Item
	BOULDER OPAL ROUGH 5.70 CTS SFJ 1844 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$135.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW-- 22.70 CTS [BY2099] SEDA ROUGH OPALS	- 2 days 10 hours	$14.00 USD View / Buy This Item
	EARTHQUAKE BOULDER ROUGH RUB 102 CARATS GTT 937 Gem traders	- 2 days 10 hours	$23.00 USD View / Buy This Item
	BOULDER ROUGH FROM HAYRICKS MINE 13.7CTS [BMA175] BOULDER MAGIC	- 2 days 10 hours	$17.00 USD View / Buy This Item
	EARTHQUAKE BOULDER ROUGH RUB 88CARATS GTT 951 Gem traders	- 2 days 10 hours	$23.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW -- 24.70 CTS [BY2079] SEDA ROUGH OPALS	- 2 days 10 hours	$14.00 USD View / Buy This Item
	BOULDER OPAL ROUGH 2.75 CTS SFJ 1838 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$19.00 USD View / Buy This Item
	BOULDER OPAL ROUGH 3.10 CTS SFJ 1849 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$59.00 USD View / Buy This Item
	BOULDER ROUGH FROM THE HAYRICKS MINE 6.7CTS [BMA109 ] BOULDER MAGIC	- 2 days 10 hours	$17.00 USD View / Buy This Item
	EARTHQUAKE BOULDER ROUGH RUB 90 CARATS GTT 945 Gem traders	- 2 days 10 hours	$23.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW -- 29.35 CTS [BY2072] SEDA ROUGH OPALS	- 2 days 10 hours	$23.00 USD View / Buy This Item
	MULTI FIRE BOULDER OPAL ROUGH 5.55 CTS MM 1889 16 x 11 x 4mm opalmania	- 2 days 10 hours	$35.00 USD View / Buy This Item
	FACED & SHAPED BOULDER OPAL RUB READY TO POLISH 16.50 CTS 35 x 10 x 4mm AUSTRALIANROUGHOPAL	- 2 days 10 hours	$17.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW -- 23.75 CTS [BY2083] SEDA ROUGH OPALS	- 2 days 10 hours	$21.00 USD View / Buy This Item
	BOULDER OPAL ROUGH 8.20 CTS SFJ 1841 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$99.00 USD View / Buy This Item
	BOULDER ROUGH FROM QUILPIE 13.4 CTS [BY314 ] SEDA ROUGH OPALS	- 2 days 10 hours	$25.00 USD View / Buy This Item
	BOULDER ROUGH FROM HAYRICKS MINE 8.7CTS [BMA174] BOULDER MAGIC	- 2 days 10 hours	$17.00 USD View / Buy This Item
	BOULDER OPAL ROUGH 2.75 CTS SFJ 1837 (FO-TBO) FOSSIL OPALS	- 2 days 10 hours	$59.00 USD View / Buy This Item
	BOULDER MATRIX ROUGH WORM BURROW-- 25.35 CTS [BY2089] SEDA ROUGH OPALS	- 2 days 10 hours	$21.00 USD View / Buy This Item
	BOULDER ROUGH FROM QUILPIE 21.5 CTS [BY320 ] SEDA ROUGH OPALS	- 2 days 10 hours	$28.00 USD View / Buy This Item
« First  < Prev   52 53 54 55 56 57 58 59 60 61 62 63 64 65 66   Next >  Last » viewing page 59 of 86 showing search results 1741 to 1770 of 2565