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Gemstone Science
When a Filled Tanzanite Is Not a Repaired Cryst...
Fracture filling in tanzanite reduces crack visibility by matching refractive index, but it does not restore the crystal lattice. Learn the optical mechanism and the limits of detection.
When a Filled Tanzanite Is Not a Repaired Cryst...
Fracture filling in tanzanite reduces crack visibility by matching refractive index, but it does not restore the crystal lattice. Learn the optical mechanism and the limits of detection.
How Ammolite Makes Color Without Pigment: Iride...
Why ammolite is iridescent: interference in preserved ammonite shell layers, the role of diagenesis, and how evidence chains distinguish natural, treated, and assembled material.
How Ammolite Makes Color Without Pigment: Iride...
Why ammolite is iridescent: interference in preserved ammonite shell layers, the role of diagenesis, and how evidence chains distinguish natural, treated, and assembled material.
What Actually Colors Painite? Testing the Chrom...
Why painite is red-brown: trace-element chromophores, crystal-field transitions, and analytical limits in a borate host. A rigorous look at what current evidence can and cannot establish about painite color.
What Actually Colors Painite? Testing the Chrom...
Why painite is red-brown: trace-element chromophores, crystal-field transitions, and analytical limits in a borate host. A rigorous look at what current evidence can and cannot establish about painite color.
When the Crystal Does Not Grow Alone: Microstru...
Synthetic lapis lazuli is a polyphase aggregate problem, not a single-crystal one. Microstructure, scattering, microscopy, Raman, XRD, and trace-element evidence explain why appearance and identity diverge.
When the Crystal Does Not Grow Alone: Microstru...
Synthetic lapis lazuli is a polyphase aggregate problem, not a single-crystal one. Microstructure, scattering, microscopy, Raman, XRD, and trace-element evidence explain why appearance and identity diverge.
Do Thin Films on Rhodochrosite Change What a Ge...
How thin films and surface coatings on rhodochrosite affect reflectance, luster, and bulk measurements, and why surface-sensitive and volume-averaged methods answer different questions.
Do Thin Films on Rhodochrosite Change What a Ge...
How thin films and surface coatings on rhodochrosite affect reflectance, luster, and bulk measurements, and why surface-sensitive and volume-averaged methods answer different questions.
How Crystal Orientation and Lattice Structure M...
Learn how spodumene's monoclinic chain-silicate lattice, trace elements, and defect populations produce variable color, pleochroism, and stability in kunzite and hiddenite.
How Crystal Orientation and Lattice Structure M...
Learn how spodumene's monoclinic chain-silicate lattice, trace elements, and defect populations produce variable color, pleochroism, and stability in kunzite and hiddenite.