Boulder Opal is found in the state of Queensland, Australia and is the second most precious type of opal after black opal. The process of mining the rock and then turning it into a polished stone is explained here, how to Split Boulder Opal.
Boulder Opal is formed in Ironstone and in veins of colour bars. This Ironstone can be sandy in composition to deep consolidated dark brown ironstone. Boulder Opal can be found around Yowah, Australia and is more deep brown in colour compared to the sandy ironstone around Winton to Quilpie in Queensland.
This rough boulder opal is also formed in rocks and pancake shaped rocks that need to be split open so that they can be cut and polished into stones. Most opal miners crack open a rock to expose any colour so that they can ask a greater price for the rock. It’s worth noting that not all rocks have colour. It takes a lot of work to mine the rock in the first place and then sometimes miners can crack open a rock with a hammer and find no colour. It can sometimes be a game of luck for the miners. Once colour is found the miner will ‘slab’ the opal bearing rock.
博爾德蛋白石產於澳大利亞昆士蘭州,是僅次於黑蛋白石的第二貴重蛋白石。這裡解釋了開採岩石然後將其變成拋光石頭的過程,如何分裂博爾德蛋白石。
博爾德蛋白石形成於鐵礦石和彩條礦脈中。這種鐵礦石的成分可以是沙質,也可以是深固結的深棕色鐵礦石。博爾德蛋白石產於澳大利亞約瓦 (Yowah) 附近,與昆士蘭州溫頓 (Winton) 至奎爾皮 (Quilpie) 周圍的沙質鐵礦石相比,顏色更深。
這種原石蛋白石也形成於岩石和煎餅狀岩石中,需要將其劈開,以便將它們切割和拋光成石頭。大多數蛋白石礦工會敲開岩石,露出任何顏色,這樣他們就可以為岩石開出更高的價格。值得注意的是,並非所有岩石都有顏色。首先開採岩石需要大量工作,有時礦工用錘子敲開岩石卻找不到顏色。對於礦工來說,有時這可能是一場運氣遊戲。一旦發現顏色,礦工就會“切割”含蛋白石的岩石。
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