Cristal Q.B — Rolado

Quality B Crystal is a variety of Hyaline Quartz (SiO₂) that presents a higher incidence of inclusions, veils, internal fractures or turbidity in relation to Quality A Crystal, natural characteristics of the crystalline growth process in hydrothermal veins and pegmatites. The distinction between qualities is exclusively a visual and commercial selection criterion, maintaining the same physical and chemical properties of the species. The mechanical rolling process progressively rounds the ends and corners of the pieces, resulting in a smoothed external profile that preserves the internal crystalline structure. Hardness: 7 on the Mohs scale. Density: 2.65 g/cm³. Crystalline system: trigonal. Available variations, approximate data: Size: up to 3 cm Unit weight: up to 6 g (approx.) Average: 170 pieces per kg (approx.)