mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
AI-generated identification · may be incorrectHardness: 5 on Mohs scale. Color: Deep teal blue with white or brown matrix. Luster: Vitreous to sub-resinous. Crystal Structure: Hexagonal. Specific Gravity: 3.16 to 3.22.
- Hardness
- 5 on Mohs scale
- Color
- Deep teal blue with white or brown matrix
- Luster
- Vitreous to sub-resinous
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Physical properties
Hardness: 5 on Mohs scale. Color: Deep teal blue with white or brown matrix. Luster: Vitreous to sub-resinous. Crystal Structure: Hexagonal. Specific Gravity: 3.16 to 3.22.
Formation & geological history
Commonly found in igneous rocks (pegmatites), metamorphic rocks, and sedimentary phosphorite deposits. These crystals typically form in phosphate-rich environments over millions of years.
Uses & applications
Primarily used as a source of phosphorus for fertilizer. High-quality specimens are used for jewelry (though soft) and are very popular in the metaphysical and gemstone collecting markets.
Geological facts
Apatite is the defining mineral for 5 on the Mohs hardness scale. It is actually a group of phosphate minerals. The name is derived from the Greek word 'apate', meaning 'deceit', as it was often confused with minerals like beryl or tourmaline.
Field identification & locations
Identify in the field by its hexagonal crystal habit and its ability to be scratched by a steel blade (distinguishing it from beryl or quartz). Commonly found in Madagascar, Brazil, and Burma. Collectors should look for vibrant color and internal 'lightning' flashes.
