Preliminay Examen
Initial identification prior to purchasing inventory or stone trimmings - Textured A4-size letter
The “Item” field allows us to specify whether we have received a single stone, a lot, or a piece of jewelry (and the type of jewelry).
The shape, size, and dimensions describe the stone's external appearance. When you submit a piece of jewelry with multiple stones, or a batch of stones, we note the variation in diameter within the batch.
The shape, size, and dimensions describe the stone’s external appearance. When you submit a piece of jewelry with multiple stones, or a batch of stones, we note the variation in diameter within the batch.
The weight of the stones is given in carats (1 ct = 0.2 g) to two decimal places. Rounding is based on the third decimal place: if it is less than 9, the number is not rounded; if it is 9, the number is rounded up.
Ex: 0.9990 ct is reported as 1.00 carat, but 0.9989 ct is reported as 0.99 carat.
If the item is a piece of jewelry set with gemstones, it is weighed in grams to two decimal places. The rounding rule applied is arithmetic rounding.
Color provides an indication of the body color and the diffraction colors.
BLACK OPAL (NATURAL OPAL)
N - No treatment indicated
The indicated geographic origin is the Laboratory’s assessment based on
gemmological data (spectra, chemical composition, inclusions).
Australia

The colour and dimensions of the object analyzed are aproximate
For your gemstones or jewelry,
We offer 3 types of gemmological reports to suit your needs: