Opal Doublet as the name suggests, is a thin layer of precious Opal cemented onto a backing, usually a piece of common Black Opal or Ironstone. They were originally created from Opal that was perhaps too thin to produce a solid stone. Opal doublets are a cheap and inexpensive way to buy a colorful piece of precious Opal without the cost of a solid Opal. Some of the patterns and the brightness of the Opal doublets is incredible.
Imagine taking a thin piece of opal maybe only a few mm’s thick and gluing it to a thicker backing. This is exactly what an Opal doublet is. The easiest way to detect an Opal doublet is to turn it on the side and look for the join between the Opal and the backing. This is also an important time to mention Opal Triplets. Like an Opal Doublet, a Triplet is made by gluing Opal to a sold backing. However if the Opal is extremely thin sometimes a clear cap is placed over the Opal. The cap can be made of Quartz of plastic sometimes even plastic.
Opal doublets are generally set onto strong Ironstone backing which is a brown in colour. The thin slice of Opal is enhanced by the brown Ironstone and greatly increases the colour of the Opal. A slice of Opal in a doublet is a lot thicker than a Opal Triplet.
Other material such as Black Opal potch can be used as well as plastic. Ironstone is by far the most common choice because it is a natural stone and it can be found in abundance.
Opal doublets are ideal to make matching sets of Opal earrings, pendants or rings as it is easy to match the colour closely. In nature it is very rare to get matching opals, so doublets are popular in the opal industry to make matching sets.
When opal doublets are used in jewelry you will most likely find a bessel set. This is where the metal is rounded up and over the opal. This has the 2 effects
Opal doublets originally were made in Lightning Ridge, Australia by using opal crystal and set on natural Black Opal potch. These days the ability to make opal doublets is shared across the world and Ironstone is also used for the backing.
Opal doublets are just as strong as a solid opal but because they have been ‘glued’ together with a backing piece of Ironstone it is important not to clean your piece of jewelry with ultrasonic cleaners or strong chemicals. Simply wipe over with a cloth and warm soapy water.
想象一下，可能只需要几毫米厚的蛋白石，并将其粘在较厚的背衬上。这正是Opal双峰的意义所在。检测Opal双合透镜的最简单方法是将其转向侧面并寻找Opal和背衬之间的连接。这也是提到Opal Triplets的重要时刻。就像Opal Doublet一样，Triplet是通过将Opal粘合到销售的背衬上而制成的。然而，如果蛋白石非常薄，有时会在蛋白石上方放置一个透明的盖子。盖子可以由石英塑料制成，有时甚至是塑料。
可以使用其他材料，例如Black Opal potch以及塑料。铁石是迄今为止最常见的选择，因为它是一种天然石材，它可以在很多地方找到。