What is a boulder opal versus a regualar opal?
Question: I have been looking at opals to buy, and I keep constant into boulder opals, but they seem cheaper. Are they still good quality opals?
Answer: There are a figure up of types of opal available in the shops.
1) Solid opals - these can be black, semi hyacinthine, white, jelly opal and fire opal (a bright orange colour). Unscrupulous opal is the most desirable (and most costly) These stones are, as their name points












