Description
Rock Crystal from Brazil – Genuine Natural Clear Quartz Specimen
This Rock Crystal from Brazil is a carefully selected natural clear quartz specimen chosen for its clarity, structure, and strong mineral presence. The photographs show the exact crystal you will receive, ensuring full accuracy and transparency. As with all of our minerals, this piece is 100% genuine and includes a Certificate of Authenticity. Brazilian rock crystal is highly regarded for its purity, striking visual qualities, and geological importance, making it a prized addition to any mineral collection or display.
Geological Background and Formation of Rock Crystal Quartz
Rock crystal is the pure, colourless variety of quartz (silicon dioxide, SiO₂), one of the most abundant minerals in the Earth’s continental crust. It forms when silica-saturated hydrothermal fluids fill cavities, fissures, and veins within the host rock and gradually cool over long geological periods. As the temperature and pressure decrease, silica molecules organise into a trigonal, hexagonal crystal structure, producing the well-known prismatic quartz formations seen in high-grade specimens.
Brazil is one of the world’s most important sources of clear quartz. The Minas Gerais region, in particular, contains extensive pegmatite fields and hydrothermal zones that provide ideal conditions for quartz development. These regions have long geological histories involving volcanic activity, tectonic uplift, and mineral-rich groundwater circulation, all contributing to the formation of exceptionally clear quartz clusters and points.
Crystal Habit, Structure, and Natural Features
Clear quartz forms in the trigonal division of the hexagonal crystal system, most commonly developing as elongated six-sided prisms that terminate in sharply faceted points. Depending on the environment, quartz can grow singly, in clusters, or intergrown with other minerals. This specimen reflects key features typical of high-quality Brazilian rock crystal:
- Well-defined prism faces showing natural growth striations
- Clear to slightly milky internal zones, produced by small inclusions or shifts in growth conditions
- Potential veils or internal planes, which may create light reflections or subtle rainbow effects
- Strong termination structure, indicating undisturbed growth
Quartz clarity can vary significantly based on the presence of micro-inclusions, trapped fluids, or natural fracture lines within the crystal. These internal characteristics are not flaws—they are valuable geological signatures marking the natural conditions under which the crystal developed.
Mineralogical Significance and Global Context
Clear quartz is one of the most widely studied and valued minerals in geology and mineral collecting. Its structural stability, chemical purity, and ability to grow into large well-formed crystals make it essential in mineralogical research. Quartz often acts as a record of geological processes, preserving information about temperature, pressure, and the composition of mineral-bearing fluids over long timescales.
Brazilian quartz is considered among the finest in the world due to its exceptional clarity and long, uninterrupted growth phases. Specimens from this region are prized for both scientific study and aesthetic display.
Authenticity and What You Receive
You will receive the exact Rock Crystal specimen shown in the photographs. All size details are visible in the images, giving a full and accurate representation of the crystal’s proportions and natural features. Each specimen is individually chosen for its visual quality, structural integrity, and mineral authenticity. A Certificate of Authenticity is included with every purchase, verifying that this is a genuine natural quartz crystal from Brazil.
This Rock Crystal is ideal for collectors, display cabinets, educational geological study, interior décor, or anyone who appreciates the natural beauty and geological heritage of clear quartz shaped deep within the Earth over millions of years.
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