Columbianite A+ 20.4g
198,00 €Price
Value: 198€
Quantity: 20.4g
Quality: A+
Origin: Atmospheric projectile volcanic eruption (30 mil.)
Hardness: 6 Mohs
Chemical composition: SiO2 + Al2O3
Damage: 1x micro chip
Locality: Valle del Cauca, Colombia
Dimensions: 2.8cm x 2.8cm x 2.2cm
- A quality - prime specimens in terms of morphology, color, and light reflection.
- B quality – medium grade specimens.
- C quality - specimens with basic morphology, color, and light reflection.
- An additional plus stands for morphological beauty (+), color (+), or sunlight reflection (+).
- Undamaged - the specimen is faultless.
- Micro chip - minor surface damage from 1mm to 4mm.
- Small chip - minor surface damage from 4 mm to 8 mm.
- Large chip - surface damage from 8 mm to 12 mm.
- Big chip - surface damage over 12mm.
