Search Gemstone Knowledge
Gemstone Science
Why a Single Specific Gravity Reading Cannot Id...
Malachite specific gravity varies with porosity, inclusions, and sample geometry. Learn why a single density measurement cannot identify malachite, detect treatment, or distinguish it from lookalike copper minerals.
Why a Single Specific Gravity Reading Cannot Id...
Malachite specific gravity varies with porosity, inclusions, and sample geometry. Learn why a single density measurement cannot identify malachite, detect treatment, or distinguish it from lookalike copper minerals.
The Iron Shadow in Heliodor: Why Two Trace-Elem...
Why two trace-element methods can disagree about iron in heliodor, and why total iron concentration does not define yellow beryl color.
The Iron Shadow in Heliodor: Why Two Trace-Elem...
Why two trace-element methods can disagree about iron in heliodor, and why total iron concentration does not define yellow beryl color.
How Host-Rock Chemistry Constrains the Color an...
A materials-science look at how host-rock geochemistry and defect chemistry constrain the color and occurrence of imperial topaz, and why deposit geology matters.
How Host-Rock Chemistry Constrains the Color an...
A materials-science look at how host-rock geochemistry and defect chemistry constrain the color and occurrence of imperial topaz, and why deposit geology matters.
What X-ray Diffraction Reveals About Heat-Treat...
Sapphire heat treatment is not directly detectable by X-ray diffraction. Learn why lattice structure persists through treatment, how inclusions and spectroscopy provide indirect evidence, and what XRD genuinely measures.
What X-ray Diffraction Reveals About Heat-Treat...
Sapphire heat treatment is not directly detectable by X-ray diffraction. Learn why lattice structure persists through treatment, how inclusions and spectroscopy provide indirect evidence, and what XRD genuinely measures.
Why Jasper Resists Origin Fingerprinting: A Pro...
Why jasper resists geographic origin fingerprinting: microcrystalline quartz heterogeneity, trace-element averaging, reference database limits, and the scientific uncertainty in provenance testing.
Why Jasper Resists Origin Fingerprinting: A Pro...
Why jasper resists geographic origin fingerprinting: microcrystalline quartz heterogeneity, trace-element averaging, reference database limits, and the scientific uncertainty in provenance testing.
What Adularescence Reveals About Feldspar Micro...
Adularescence and labradorescence are distinct optical effects in feldspar. Learn how exsolution lamellae produce scattering versus interference, why orientation and cutting matter, and what analytical methods can establish.
What Adularescence Reveals About Feldspar Micro...
Adularescence and labradorescence are distinct optical effects in feldspar. Learn how exsolution lamellae produce scattering versus interference, why orientation and cutting matter, and what analytical methods can establish.