Search Gemstone Knowledge
Gemstone Science
Distinguishing Natural Moonstone from Synthetic...
How gemologists distinguish natural moonstone from synthetic feldspar using microscopy, trace-element chemistry, and structural evidence, and why no single test is definitive.
Distinguishing Natural Moonstone from Synthetic...
How gemologists distinguish natural moonstone from synthetic feldspar using microscopy, trace-element chemistry, and structural evidence, and why no single test is definitive.
When Beryl Loses Its Beryllium: How Alkali Subs...
How channel alkalis, unit-cell changes, and trace-element chemistry connect beryl's geological formation to aquamarine's properties and analytical limits.
When Beryl Loses Its Beryllium: How Alkali Subs...
How channel alkalis, unit-cell changes, and trace-element chemistry connect beryl's geological formation to aquamarine's properties and analytical limits.
Opal, Pleochroism, and the Limits of Optical An...
Is opal pleochroic? Learn why opal's play-of-color is a structural interference effect, not direction-dependent absorption in an anisotropic crystal lattice.
Opal, Pleochroism, and the Limits of Optical An...
Is opal pleochroic? Learn why opal's play-of-color is a structural interference effect, not direction-dependent absorption in an anisotropic crystal lattice.
How Lattice Defects Shape Sapphire Color: Subst...
How trace elements, oxidation states, charge compensation, and radiation-induced defects produce sapphire color, and why bulk chemical analysis cannot fully explain it.
How Lattice Defects Shape Sapphire Color: Subst...
How trace elements, oxidation states, charge compensation, and radiation-induced defects produce sapphire color, and why bulk chemical analysis cannot fully explain it.
Detecting Thin-Film Coatings on Moissanite: Whe...
Reflected-light microscopy and Raman spectroscopy sample moissanite differently. A thin coating can be visible at the surface yet absent from a bulk-dominated spectrum, so the two methods answer different questions.
Detecting Thin-Film Coatings on Moissanite: Whe...
Reflected-light microscopy and Raman spectroscopy sample moissanite differently. A thin coating can be visible at the surface yet absent from a bulk-dominated spectrum, so the two methods answer different questions.
Vesuvianite Solid Solution: When a Mineral Form...
How coupled substitution and multiple cation sites make vesuvianite a solid-solution mineral, and why one formula cannot capture its composition, color, or identity.
Vesuvianite Solid Solution: When a Mineral Form...
How coupled substitution and multiple cation sites make vesuvianite a solid-solution mineral, and why one formula cannot capture its composition, color, or identity.