Insights.
Observations, research notes, and analytical features from the laboratory.
What gives Paraíba tourmaline its colour
Copper, manganese and iron between them produce the colours of Ethiopian tourmaline. How each is identified, and why…
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…
The hidden signature of Paraíba and copper-bearing tourmaline from Ethiopia
A study of 69 Paraíba and copper-bearing tourmalines from the new Abuloo deposit in Ethiopia, and the trace element…
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…
Seeing Double: Inside a Rare Transparent Triplite Gemstone
Transparent faceted triplite represents an exceptionally uncommon specimen in gemological collections. The mineral…
Space Splendor Inclusions within Cobalt Blue Spinel from Mahenge, Tanzania
Cobalt blue spinel from Mahenge Cobalt Blue Spinel 钴蓝尖晶石（钴尖晶）originating from an important spinel deposit in Mahenge…
The Intriguing World of Zircon Inclusions in Madagascar Sapphires.
Forward In “Unveiling the Intriguing World of Zircon Inclusions in Madagascar Sapphires,” Seangrit elucidates…
High Iron Yellow Sapphire with Beryllium Treatment
Figure 1The six beryllium diffused, high Fe, yellow sapphires described in this report. Step into the captivating…
The fascination and understanding of amber
Occasionally as we become engrossed in a gem material that may be new, or at least partially new, to us, and…
Synthetic Malachite
Why synthetic malachite matters Given its largely ornamental usage, the presence of synthetic malachite on the market…
The Detection of Heat Treatment in Blue Sapphire Using FTIR & Some Notes on Related Internal Features
Heat treatment is used to improve the colour and clarity of blue sapphires (Abraham,1982; Anonymous, 1917; Fryer, 1983;…
The Fascinating Interiors of Rhodolite Garnets
Amongst the variety of garnets worldwide, Rhodolite to many is a highly valued and beautiful gemstone for its color and…