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Made in US from a reputable maker. Sturdy for field use.
Uses 2 pieces of calcite to split light to check for pleochroism (singly e.g. spinels, garnets, glass versus doubly refractive gemstones e.g. sapphires, rubies, tourmalines, zircons etc).
Made in US from a reputable maker. Sturdy for field use.
Uses 2 pieces of calcite to split light to check for pleochroism (singly e.g. spinels, garnets, glass versus doubly refractive gemstones e.g. sapphires, rubies, tourmalines, zircons etc).