Gemological stone quality control in Berlin – your guarantee of authenticity, quality, and maximum transparency
Every opal is inspected by our team and receives its own GSB certificate – an internal Liberty Angels quality document that confirms authenticity, origin, and type of craftsmanship.
Echtheit garantiert
Every opal tells its own story – but many of the pieces on the market simply aren’t what they promise to be. Plenty of sellers stay vague about their stones, and some even sell synthetics.
With Liberty Angels you can be certain: every opal is genuine. The GSB certificate confirms authenticity, origin and quality – so what you hold in your hands is a verified original.
Each opal is tested and documented by us (not a synthetic stone).
We determine the exact type of each opal.
Our opals come from the most important deposits, especially Australia and Ethiopia.
The GSB certificate describes the color play of your opal – from nuances to the spectrum.
We will tell you what your real opal is made of – whether it is a full opal, a doublet or a triplet.
Each GSB certificate is uniquely linked to your order. Using your name and order number, you can verify online at any time that your opal has been inspected and documented by Liberty Angels through our database.
If your GSB certificate is lost, we can issue you a new one free of charge at any time, with no shipping costs (contact form) .
Microscopic analysis
We examine each opal under a microscope (10–40×). This allows us to detect inclusions, surface texture, and details invisible to the naked eye.
Light & UV testing
Under different lighting conditions and UV reactions, the unmistakable play of colors of a natural opal becomes apparent compared to a synthetic one.
Density / hydrostatic measurement
If necessary, we determine the stone's density using hydrostatic methods. This allows us to clearly distinguish natural opals from synthetic ones.
Refractometer test
We use the refractometer to measure the refractive index – a specialized value that allows conclusions to be drawn about the authenticity and material structure of the stone.
Every opal is inspected by our team and receives its own GSB certificate – an internal Liberty Angels quality document that confirms authenticity, origin, and type of craftsmanship.
