mineral
Polished blue apatite tower
Apatite, commonly fluorapatite (Ca₅(PO₄)₃F)
AI-generated identification · may be incorrectVivid blue-green, translucent to opaque, with vitreous luster and visible cleavage/fracture planes; Mohs hardness 5, hexagonal crystal system, specific gravity about 3.1–3.2. The pointed, polished form is human-shaped from natural material.
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Physical properties
Vivid blue-green, translucent to opaque, with vitreous luster and visible cleavage/fracture planes; Mohs hardness 5, hexagonal crystal system, specific gravity about 3.1–3.2. The pointed, polished form is human-shaped from natural material.
Formation & geological history
Apatite forms in igneous pegmatites, hydrothermal veins, and metamorphic rocks; blue gem-quality material is notably associated with Madagascar, Brazil, Mexico, and Norway. Its age depends on the host rock, ranging from hundreds of millions to billions of years.
Uses & applications
Used as a collector specimen and occasionally as a gemstone; phosphate apatite is also an important source of phosphorus for fertilizer. This polished tower has primarily decorative and lapidary value.
Geological facts
Blue apatite is often intensely colored by trace elements and may resemble turquoise or blue-green beryl. It is softer and more easily scratched than quartz, making it unsuitable for heavily worn jewelry.
Field identification & locations
Identify it by its saturated blue-green color, moderate softness, hexagonal habit, and glassy luster; a steel knife may scratch it, while quartz should not. Common localities include Madagascar, Brazil, Mexico, and Canada.
