The Opale Analysis Report

Features

Page 1 of report

N°000000
Paris, xx/xx/xxxx
Object
Loose stone

Object

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).

Number of stones analyzed
1
Shape - Cut
Ovale - Cabochon

Shape - Cut

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.

Measurements
18.11 x 14.19 x 8.24 mm

Measurements

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.

Mass
13.19 ct

Mass

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 of mass
N3

Color of mass

Color provides an indication of the body color and the diffraction colors.

Play of colors
Mostly blue to green
Comments
Numerous parallel polysynthetic macles, sometimes described as “straw-like” patterns

Scientific instruments used

  • Mass measurement
  • Normalised ligthing
  • Infrared spectometer (FTIR)
  • Measurer
  • Ultraviolet lamps
  • Spectometer Raman
  • Photography device
  • Microscope
  • Spectometer EDXRF

Identification

BLACK OPAL (NATURAL OPAL)


Traitements

N - No treatment indicated


Geographic Origin

The indicated geographic origin is the Laboratory’s assessment based on
gemmological data (spectra, chemical composition, inclusions).

Australia


Photography

The colour and dimensions of the object analyzed are aproximate


A. Delaunay, DUG, MSc

U. Hennebois, DUG, MSc

Test results

For your gemstones or jewelry,

We offer 3 types of gemmological reports to suit your needs:


    Preliminay Examen

    Initial identification prior to purchasing inventory or stone trimmings - Textured A4-size letter

    Analysis Report

    The classical and complete analysis report for the end-buyer - A5 bristol booklet.

    Elite Report

    The prestigious, tailor-made analysis report, highlighting the exceptional stones and jewels - A4 landscape format triptych folder.