Q.A Natural Crystal with Metal Base — Rough

Quality A Crystal is the purest and most transparent form of Hyaline Quartz (SiO₂), selected because it presents a minimum incidence of inclusions, fractures, veils or internal turbidity. Its superior transparency results from exceptionally stable conditions of temperature, pressure and chemical purity during crystalline growth in hydrothermal veins and pegmatites. Classification by quality is determined by the absence of visible structural defects, regularity of crystalline faces and degree of optical transparency. Quality A specimens are located at the top of the commercial selection scale for hyaline quartz, distinguishing themselves from standard Natural Crystal due to the greater homogeneity and clarity of the material. Hardness: 7 on the Mohs scale. Density: 2.65 g/cm³. Crystalline system: trigonal. The product is sold with a metal base included, ready for display. The measurements and weight stated refer to the complete product (crystal + base). Available variations, approximate data: Weight: 0.150 to 0.600 kg (approx.) Dimensions: 9x4x4 cm to 16x6x6 cm (approx.)