I don't think zircon ever naturally comes in dark blue. All of these stones are heated in a reducing atmosphere. I have a vague memory of some very light blue stones occasionally being found? Even that might be contentious.
I just bought a RCC zircon from a burma dealer, Is this kind of RCC normally heated?
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I also heard there is natural Red-Green Zircon insist. Is that real, if so, where is the origin then?
Sorry The RCC is short for Reverse Colour Change, I found records of the changes 2 types from light brown to Red and from Blue to Green under different light sourses.
I don't think zircon ever naturally comes in dark blue. All of these stones are heated in a reducing atmosphere. I have a vague memory of some very light blue stones occasionally being found? Even that might be contentious.
Yes, I collected some faceted purple zircon from Burma, But could not confirm the origin, some said from Vietnam. But no heat evidence been found.
Here is a brief article by Oliver Waldis who I consider one of the most gifted gem/mineral explorers I have ever met. Curiosities just seem to call to him, "Over here Oliver, I'm right over here."
Here is a brief article by Oliver Waldis who I consider one of the most gifted gem/mineral explorers I have ever met. Curiosities just seem to call to him, "Over here Oliver, I'm right over here."
Recently I found another 10ct size RCC zircon, will it worth to buy as a collecting piece? Do you have any suggestion about this? What is the odds to get this kind of effect after heating?
will it worth to buy as a collecting piece? Do you have any suggestion about this?
Only you can answer this question. In a general sense, it's a relatively rare, and quite attractive, variant of a somewhat popular gem, and it has a strong 'nifty' factor. But for collecting it comes down to whether you want it or not, and how it fits in with whatever else is in your collection.
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