Description
This stunning A-grade Rock Crystal Quartz specimen from Brazil represents one of nature’s purest and most visually captivating minerals. Known worldwide for its exceptional clarity, high lustre, and symmetrical form, Brazilian Rock Crystal is prized by both collectors and geologists. Each crystal is carefully hand-selected for its remarkable transparency, light refraction, and aesthetic balance, making it an outstanding example of High Grade Quartz.
The specimen pictured is the exact piece you will receive, photographed to show its natural beauty and form in full detail. The scale cube = 1 cm, allowing you to gauge the true size and proportions of the crystal. Every item is accompanied by a Certificate of Authenticity, verifying it as a 100% genuine natural specimen.
Geological Origin
This Rock Crystal was formed deep within the ancient hydrothermal systems of Minas Gerais, Brazil, one of the most famous mineral-producing regions on Earth. The area’s geology is dominated by granitic pegmatites and quartz-rich veins, which have provided the ideal chemical environment for the growth of flawless quartz over millions of years.
Quartz (chemical formula SiO₂) belongs to the tectosilicate subclass of silicate minerals, crystallising within the trigonal crystal system. Its crystal growth occurs when silica-saturated hydrothermal fluids circulate through fractures in the Earth’s crust. Over time, cooling and pressure changes allow the silica to crystallise slowly, producing these distinctive hexagonal prismatic structures capped by six-sided pyramidal terminations.
This specimen was formed during the Cretaceous to Tertiary geological period, as deep crustal fluids interacted with ancient granitic formations. The exceptional purity of Brazilian Rock Crystal is due to the near absence of mineral inclusions or impurities during its formation, resulting in a crystal that is almost entirely transparent.
Mineralogical Features
The A-grade Rock Crystal Quartz displays the classic hexagonal prism and pyramidal termination that defines perfectly formed quartz crystals. Fine horizontal striations along the prism faces indicate natural crystal growth lines, while internal reflections create a dazzling interplay of light. When held to the sun, the crystal emits a radiant brilliance that highlights its internal geometry.
Quartz is both piezoelectric and pyroelectric, meaning it can generate an electric charge under mechanical stress or temperature variation. This property gives quartz scientific significance in modern technology, where it is used in watches, oscillators, and optical instruments. Collectors, however, value it for its purity, energy, and timeless geological beauty — a physical manifestation of natural equilibrium and precision.
Geological and Scientific Importance
Quartz is one of the most abundant and stable minerals in the Earth’s continental crust. As a macrocrystalline variety of silica, Rock Crystal represents the most chemically and structurally perfect form of quartz. Each crystal records millions of years of geological activity, offering insight into the pressure, temperature, and fluid dynamics that shaped Earth’s interior.
The Brazilian quartz fields are particularly significant for their consistent crystal growth environments, free from disturbance and contamination. These geological conditions make Minas Gerais the premier global source of museum-quality quartz. Specimens from this region are renowned for their optical clarity and perfect natural terminations, qualities that make this crystal a fine collectible and display piece.
Authenticity and Presentation
Every Rock Crystal we offer is 100% genuine, carefully chosen for its quality and authenticity. A Certificate of Authenticity is included with your purchase, confirming the natural origin and purity of your specimen. The scale cube = 1 cm, and full sizing can be seen in the photographs, ensuring that what you see is exactly what you receive.
This A-grade Rock Crystal Quartz from Brazil is not only a geological treasure but also a timeless representation of nature’s ability to create order, clarity, and beauty through the slow artistry of geological time. Perfect for collectors, educators, or anyone who appreciates the finest examples of Earth’s natural minerals.
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