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Gemstone Science
When Rhodolite Garnet Stops Being Clear: How In...
Why some rhodolite garnets look cloudy or translucent: how internal light scattering competes with absorption, what the microscope can and cannot resolve, and why inclusion counts mislead.
When Rhodolite Garnet Stops Being Clear: How In...
Why some rhodolite garnets look cloudy or translucent: how internal light scattering competes with absorption, what the microscope can and cannot resolve, and why inclusion counts mislead.
Strained Scapolite: Reading Deformation from th...
How deformation, twinning, and cut orientation affect the optical behavior of scapolite, and why a polariscope reading alone cannot establish a strain origin.
Strained Scapolite: Reading Deformation from th...
How deformation, twinning, and cut orientation affect the optical behavior of scapolite, and why a polariscope reading alone cannot establish a strain origin.
The Texture of Time: How Maturation, Not Mere A...
A gemological and chemical explanation of how amber and copal differ through polymerization and oxidation rather than age alone, and why spectroscopy, not a single test, resolves the distinction.
The Texture of Time: How Maturation, Not Mere A...
A gemological and chemical explanation of how amber and copal differ through polymerization and oxidation rather than age alone, and why spectroscopy, not a single test, resolves the distinction.
Reading Growth Zoning in Dyed Agate: What Bandi...
Why dyed agate color follows some internal pathways and not others: a guided look at growth banding, porosity, and the analytical reasoning that links microstructure to visible color.
Reading Growth Zoning in Dyed Agate: What Bandi...
Why dyed agate color follows some internal pathways and not others: a guided look at growth banding, porosity, and the analytical reasoning that links microstructure to visible color.
Iron Oxide in the Service of Biology: How Hemat...
Hematite anchors a scientific look at biomineralization in pearls, coral and shell, showing why iron oxides are biogenic minerals but not components of nacre, and why mineral phase, organic matrix...
Iron Oxide in the Service of Biology: How Hemat...
Hematite anchors a scientific look at biomineralization in pearls, coral and shell, showing why iron oxides are biogenic minerals but not components of nacre, and why mineral phase, organic matrix...
Alexandrite's Growth History, Read Through the ...
Why can laboratories reach different conclusions about alexandrite's growth history? A look at growth zoning, trace-element evidence, spectroscopy, and the interpretive limits of gemological analysis.
Alexandrite's Growth History, Read Through the ...
Why can laboratories reach different conclusions about alexandrite's growth history? A look at growth zoning, trace-element evidence, spectroscopy, and the interpretive limits of gemological analysis.