Prismatic crystal of Barite on Calcite crystals.

柱状晶形的重晶石在方解石晶簇上。

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The vacuum itself is polarized, becoming strongly birefringent, like a calcite crystal.

真空本身被极化，变得具有很强的双折射性质，如同方解石一般。

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Principle and design of a ring sight consisting of calcite crystal plate and polarized elements are proposed.

本文介绍一种光环瞄准镜的原理和设计，它是用方解石晶体薄片和偏振器件组成。

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The work in Nature Communications can hide centimetre-sized objects, limited only by the calcite crystal's size.

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This is a large calcite crystal recovered from a vessel that went down off the coast of Alderney, in the Channel Islands, in Elizabethan times.

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