What is Opal two-story stone? How to identify the second floor stone?

"Because the natural opal is solidified by the infiltration of silica solution into the crevices of rock strata, opal in nature is often generated in sheets, which are too thin to be used alone after cutting and polishing, and the resources of opal are so scarce that these small sheets with gem-grade luster and color are unbearable to throw away, so they are bonded to the dark substrate or surrounding rock with dark adhesive, and then formed by cutting and polishing. The original thin and transparent color, which is not easy to display, presents a beautiful color-changing effect like black opal against the background of dark color. Because it looks like black opal, and the price is often only one tenth to one percent of that of black opal, it is also called "black opal for the poor".

this kind of two-story stone is usually marked as "Doublet stone" by honest merchants, but sometimes in the market, especially when traveling to Australia, some consumers don't understand the meaning of the English label, and sometimes they mistakenly buy it as a natural opal. It is not difficult to judge this kind of two-story stone, just observe whether there are seams on the side of the gem.

To learn more about opal identification, I recommend a book "Opal Collection and Appreciation" written by a famous domestic opal expert. If you want to buy a cost-effective two-story stone, I recommend the brand Aoyubao to you. Opals

Australia, as the largest opal jewelry supplier in Australia, not only produces excellent black opal, white opal and iron opal jewelry, but also is the largest commercial company that makes two-story stones. Aoyubao only chooses white opal with changeable color and superior quality to make a solid and perfect two-story stone, and then according to the quality of the two-story stone itself, it chooses gold or silver to make exquisite jewelry with different prices to meet the different collection and wearing needs of opal lovers all over the world.

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