Category: jewelry watches gemstones

Question:
from the Story of the Stone bought a black onyx bracelet in the sun can be seen above the white stripes, why ah?

Answer:
agate is Aphanitic of silica, often with a strip structure. These bands can have different colors (red, blue, purple, green, black, white, etc.), If it was black and white bands, called onyx; was red and white stripes are called sardonyx.

if the black onyx band is very wide, and can be individually cut out processed into black onyx beads , where inevitably there is still a thin white stripe, can be seen under the sun. Therefore, seen in black onyx beads with tiny white stripes, is normal.

Answer:
Agate The stripes are parallel to the growth of dark and light colors mixed, you see exactly when the light and stripes parallel, so crystal clear, normal.

黑玛瑙

分类:首饰钟表 宝石

问题:
从石头记买的1条黑玛瑙手链在太阳下能看到上面有白色的条纹，为什么啊？

回答:
玛瑙是隐晶质的二氧化硅,经常具有条带状构造.这些条带可以具有不同的颜色(红,蓝,紫,绿,黑,白等等),如果是呈黑白相间的条带,就称为缟玛瑙;呈红白条带者就称为缠丝玛瑙.

如果缟玛瑙中的黑条带很宽,就…