Semi-precious stones

Minerals that are characterized by lower durability and hardness or less noble appearance compared to precious stones. Examples include amethyst, turquoise, lapis lazuli, jadeite, hematite, and tiger's eye.

Interesting facts about semi-precious stones that may surprise you:

• Amethyst was once more expensive than diamond

In ancient Rome and Greece, it was considered a symbol of luxury and was reserved for the aristocracy. It was only the discovery of large deposits in Brazil that made it more accessible.

• Lapis lazuli was used as a pigment in painting

This intensely blue stone was ground and used to create ultramarine – one of the most expensive pigments in Renaissance painting. It was used by, among others, Leonardo da Vinci.

• Tourmaline can become electrified

Rubbing tourmaline generates an electrostatic charge. For this reason, it was once called the “electric stone.”

• Fluorite can glow in the dark

Some varieties of fluorite exhibit fluorescence – they glow under UV radiation, adding to their mysterious charm.

• Malachite was used as protection against the evil eye

In ancient Egypt and Greece, it was believed to protect against negative energy. It was worn as an amulet and also used in powdered form as a cosmetic.

• Obsidian is natural volcanic glass

It forms from lava that cools very quickly without forming a crystalline structure. In ancient times, it was used to produce blades and mirrors.

• Adventurine is a stone of luck

In Chinese culture, it is considered a talisman that attracts prosperity and favorable opportunities. It is often worn as an amulet for good fortune.