Banded Fluorite Tower – Green & Purple Growth Zoning
Banded Fluorite Tower – Green & Purple Growth Zoning
Banded Fluorite Tower – Green & Purple Growth Zoning
A polished banded fluorite tower showing distinct natural colour zoning, with layered green and purple bands formed during crystal growth.
This piece clearly displays horizontal growth bands, where changes in chemistry during formation caused shifts in colour. The purple bands are typically linked to trace elements and structural defects in the crystal lattice, while the green zones reflect different chemical conditions during growth.
The internal structure shows natural zoning, slight translucency, and internal veils, giving depth and movement when viewed in light.
✨ Key Features
📍 Strong green and purple banding (natural zoning)
📍 Clearly defined horizontal growth layers
📍 Translucent body with internal structure visible
📍 Polished tower highlighting internal patterns
📍 Subtle internal veils and mineral variation
📍 Clean point with good symmetry
📏 Dimensions
Size: 7.3 cm x 2.5 cm
Weight: 62 grams
🔬 Geological & Scientific Notes
Mineral: Fluorite
Chemical Formula: CaF₂
Mineral Class: Halide
Crystal System: Cubic (isometric)
Hardness: 4 (Mohs)
Lustre: Vitreous
Transparency: Transparent to translucent
Fluorite forms in hydrothermal veins, where mineral-rich fluids deposit layers over time. The banding seen here is known as colour zoning, caused by fluctuations in trace elements and growth conditions.
🧪 Formation Insight
This banding develops when:
Mineral-rich fluids change composition over time
Different trace elements are incorporated into the crystal
Growth pauses and resumes, creating visible layers
This is why fluorite often shows striped or layered colour patterns rather than a single uniform colour.
🧼 Care
Soft mineral (Mohs 4) – avoid drops and knocks
Keep away from prolonged direct sunlight (can fade colour)
Clean gently with water and a soft cloth
Avoid chemicals and ultrasonic cleaners
💬 Honest Note
This is a natural fluorite specimen.
Internal lines, zoning, and minor inclusions are part of natural crystal growth and not defects.