Tag Archives: Gemstones

Emerald: The verdant stone

From time immemorial, precious stones have been the favoured muse of distinguished authors. The emerald in particular is found referenced in ancient biblical scriptures, in the prolific writings of Pliny the Elder, and generously peppered throughout Shakespeare’s sonnets and plays.

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A gift from nature: The 10 optical phenomena of gemmology

What is an optical phenomenon? Plainly put, this term embodies the result of the way light interacts with the crystalline structure, inclusions, and/or internal structure of a gemstone. It is, in essence, the reflection, diffraction, absorption, and/or diffusion of that light. Without even knowing, we encounter these phenomena on a daily basis, whether in opal, moonstone, alexandrite, or cat’s eye chrysoberyl—that said, one should be careful not to confuse optical property, such as dispersion in a diamond, with optical phenomena.

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