In Mexico there are plenty of opals. They have already been worked by the Aztecs. Mexico was subsequently Opal provider to Europe. With the discovery of opal in Australia I became the second largest exporter of Opal.
The extraction of opal in Mexico is more difficult than in Australia. As the bedrock of volcanic origin and contain a lot of quartz, miners have no choice but to use explosives, with consequent damage to the quality of Opal. It is also much wasted.
There are many kinds of Opal in Mexico. This presented here is opal matrix.
The matrix is very hard and can work it into jewelery smoothly.
Some Opal Mexico is prone to cracking, so after carving is convenient to leave some time before being marketed, to check that they are stable.
Opal presented here has had time to dry and guarantee its stability.