Raw Blueberry fluorite from China

Origin, formation and sites

This rough Blueberry fluorite has ink-blue to blue-violet crystals. In some pieces, the nearly black crystals stand out clearly against a cream-colored matrix. In others, the crystals are closely packed together and a large part of the surface is blue.

Fluorite often forms when warm, mineral-rich water flows through cracks and cavities in the rock. If the water cools or changes in composition, calcium fluoride (CaF₂) can crystallize on the walls.

These rough pieces come from China.

History and naming

The trade name Blueberry is English for 'blueberry'. The name refers to the dark color and the rounded shape of some crystals.

The name fluorite comes from the Latin fluere , which means 'to flow'. During the smelting of ores, fluorite was added to make the slag more fluid, so that it could be separated from the metal more easily.

Spiritual aspects

In modern crystal traditions, blue fluorite is associated with calm and concentration.

Some enthusiasts use a rough specimen as a focal point during meditation.

Interaction, care and safety

Fluorite has a hardness of 4 on the Mohs scale. The crystals can break along natural cleavage planes upon impact. Carefully remove dust with a soft, dry brush.

Lift the piece from the bottom and set it down stably. Store it separate from harder minerals such as quartz, which can cause scratches.

Fun facts

• Fluorite often forms cubes. It can also grow as an octahedron, a crystal form with eight triangular faces.
• Different color zones can develop within a single fluorite crystal when conditions change during growth.