ICA | GemLab.
Articles credited to ICA | GemLab are prepared by the laboratory's gemologists. Founded in 2016 and headquartered in Bangkok, the laboratory examines coloured gemstones using six advanced techniques and documents its findings in reports.
Explainer
What gives Paraíba tourmaline its colour
Copper, manganese and iron between them produce the colours of Ethiopian tourmaline. How each is identified, and why…
Explainer
Is Ethiopian Paraíba real Paraíba?
Paraíba began as a place and became a name for a kind of tourmaline. What that means for copper-bearing tourmaline from…
Specimen Observation
Crystal Inclusions and Iron-Strain Features in Natural Pink Sapphire
An unheated vivid pink sapphire reveals crystal inclusions and iron-strain patterns in healed fissures, providing…
Specimen Observation
Seeing Double: Inside a Rare Transparent Triplite Gemstone
Transparent faceted triplite represents an exceptionally uncommon specimen in gemological collections. The mineral…