The English word 'crystal' means 1: glassware made of quartz; 2: a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces; 3: a solid...
The English word 'crystal' means 1: glassware made of quartz; 2: a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces; 3: a solid...