In ancient Greece, almost all chalcedony quartzites were white or dark brown or black like nails. Now when we talk about onyx, we generally refer to black chalcedony quartzite. We don't use this name for other varieties, such as white, reddish brown, green, brown and banded colors. Red-brown and white series are called red agate (also called silk-wrapped agate) today.

The ancient Romans regarded onyx as an excellent carving art jewelry because of its multi-color layers. In Rome, onyx is expensive, especially as a high-grade material for stamps. It is said that onyx never sticks to wax.

Scipio, the Roman conqueror, was famous for being covered with onyx. Because of her mythical origin, people believe that onyx can promote the growth of nails, hair and skin.

Origin: Brazil, India, Madagascar

Scala, Uruguay

Color: black, white

Hardness: 6.50

Refractive index: 1.54

Relative density: 2.59-2.6 1

Especially suitable for men, onyx is often associated with intuition. At the same time, people also believe that she has the energy to deeply analyze the situation before acting, and can help people acquire business skills and achieve business success. Crystal therapists believe that she can help people restore their confidence in life and love, thus increasing your happiness.

That's the truth.

Seasonal gemstones can usually be divided into two categories according to the size of their single crystals. Coarse crystal group includes amethyst, amethyst, topaz, green crystal and many other famous gems, and aphanitic crystals contain very fine crystals, which are even difficult to detect. However, not all chalcedony in this classification meets the properties of aphanitic quartzite, and there are other gems that meet this standard.