Laser and infrared tests separate amber from imitations, with a surface cost
A single peer-reviewed laboratory study distinguished genuine amber, younger resin and synthetic imitations with infrared and laser measurements. Its twelve samples showed differences in molecular spectra, elemental traces and surface response. The laser removes a little material and leaves a crater, so the result concerns authentication with limited surface damage rather than a completely untouched object or a universal accuracy guarantee.
Science··Night
Twelve samples put amber identity to the test
A single peer-reviewed Scientific Reports study compared genuine amber with materials that can resemble it. Amber is fossilized natural resin; the tests also included copal, a younger resin, and synthetic imitations. The sample set comprised seven genuine pieces, one copal piece and four imitations. Infrared measurements, made after samples were powdered, compared the molecular groups present in each material. Genuine samples had similar spectra, with different patterns in copal and imitations.[1]
Laser light reads elemental traces
The researchers then directed laser pulses at several positions on sample surfaces. A pulse dislodges a small amount of material, creating plasma whose emitted light reveals elemental traces. Measurements in air and argon explored how the surrounding gas affected the comparison. A statistical method called principal-component analysis separated the tested material groups using their spectra. Some imitations contained trace elements that could be linked to manufacturing, while genuine amber showed higher magnesium content.[1]
The surface changes with the material
The laser left a small crater. Its surroundings showed cracking or melted material in genuine amber, burning or color changes in imitations, and melting without burning in copal. Surface effects therefore formed another part of the comparison. They also matter when an object must be preserved. The elemental measurements were qualitative, without a calculated detection limit. Findings describe this set of samples and do not establish a single element or accuracy rate that identifies every amber object.[1]
