No reserve price Quartz - 159.23 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Colorless Quartz

Quartz is one of the most abundant and widely recognized minerals on Earth, prized both for its abundance and its diverse range of forms and colors. The specimen described here is a colorless quartz, which is often referred to as rock crystal. This variety is valued for its clarity and transparency, making it desirable for both collectors and artisans using it in jewelry or decorative objects. Quartz crystals form as silicon dioxide (SiO2) through a slow crystallization process from molten magma or hydrothermal solutions. The Antwerp Laboratory for Gemstone Testing (ALGT) certification ensures the authenticity and quality assessment of this substantial 159.23-carat specimen. Colorless quartz is notable for its hardness (7 on the Mohs scale), durability, and vitreous luster, which contributes to its widespread use in various applications beyond gemstones, such as in watchmaking and optical instruments. Collectors often seek pieces with exceptional clarity and size, as quartz crystals with these characteristics are rarer and demonstrate the elegance of this ubiquitous mineral.