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Gemstone Science
Demantoid Garnet: Why Treatment Rarely Changes ...
Demantoid garnet resists most colour treatments because chromium and iron sit in a rigid garnet framework. Learn how fracture filling and coatings work, and why deposit geology and mining artefacts...
Demantoid Garnet: Why Treatment Rarely Changes ...
Demantoid garnet resists most colour treatments because chromium and iron sit in a rigid garnet framework. Learn how fracture filling and coatings work, and why deposit geology and mining artefacts...
When a Star Ruby Is Not a Star Ruby: Hardness, ...
Star rubies can look alike but differ in origin and structure. Explore how hardness, cleavage, fracture mechanics, and inclusions explain convergent appearance and analytical limits.
When a Star Ruby Is Not a Star Ruby: Hardness, ...
Star rubies can look alike but differ in origin and structure. Explore how hardness, cleavage, fracture mechanics, and inclusions explain convergent appearance and analytical limits.
What Jasper's Microstructure Reveals About Its ...
A scientific look at how jasper's cryptocrystalline quartz texture and iron-oxide distribution record depositional conditions, and why reconstructing its formation history involves substantial uncertainty.
What Jasper's Microstructure Reveals About Its ...
A scientific look at how jasper's cryptocrystalline quartz texture and iron-oxide distribution record depositional conditions, and why reconstructing its formation history involves substantial uncertainty.
Sodalite Host-Rock Geology and the False-Positi...
How sodalite's host-rock context, coexisting feldspathoids, and fluid history create false-positive and false-negative risks in deposit interpretation.
Sodalite Host-Rock Geology and the False-Positi...
How sodalite's host-rock context, coexisting feldspathoids, and fluid history create false-positive and false-negative risks in deposit interpretation.
Reading the Inside of a Pearl: What Microstruct...
A scientific look at internal microstructures in natural pearls, why exsolution terminology can mislead, and how microscopy, diffraction, and spectroscopy help interpret biomineral growth and alteration.
Reading the Inside of a Pearl: What Microstruct...
A scientific look at internal microstructures in natural pearls, why exsolution terminology can mislead, and how microscopy, diffraction, and spectroscopy help interpret biomineral growth and alteration.
Labradorite's Iridescent Schiller: The Role of ...
Labradorescence is caused by interference from exsolution lamellae in plagioclase feldspar. Learn how solid-solution chemistry and cooling history create this spectral effect and why it differs from other iridescence.
Labradorite's Iridescent Schiller: The Role of ...
Labradorescence is caused by interference from exsolution lamellae in plagioclase feldspar. Learn how solid-solution chemistry and cooling history create this spectral effect and why it differs from other iridescence.