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Natural Crystal Boulder Opal 23.21 ct
USD $5,50038.1ct Large Crystal Boulder Opal
USD $3,80013.2ct Natural Crystal Boulder Opal
USD $2,9806.4ct Natural Crystal Boulder Opal
USD $1,9853.35ct Natural Crystal Boulder Opal
USD $1,350Crystal Boulder Opals
Crystal Boulder Opals are found in Boulder Opal mining, often unintentionally whilst searching for Ironstone Boulder Opals. Crystal Boulder Opal is often lighter in color, and usually either purple, blue, green, pink and sometimes rainbow.
They are different to Boulder Opals in that they are found in Sandstone apposed to Ironstone, and often in pockets rather than inside of large boulders that you need to smash open with a sledgehammer.
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The sandstone is more fragile than ironstone boulder opals.
The precious opal found is, like the name says, crystalised; apposed to ironstone boulder opals which are not.
Crystal opal is transparent, meaning that light can pass thru it.
It is therefor recommended to set them with some sort of backing or bezel.
This traps the light in to ensure your opal is always showing off at its best colors, pattern and brightness.