What is “Panna Stone”
“Panna stone” is the Hindi/Urdu/common-Indian term for what is internationally known as an emerald. It belongs to the beryl family (chemical formula roughly Be₃Al₂(SiO₃)₆, with traces of chromium or vanadium giving the green colour). Emeralds typically range from bluish-green to deep verdant green; the most coveted are those with a vivid, even...
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