A-Grade Clear Quartz Crystal Cluster from Brazil – Genuine Natural Rock Crystal Mineral with Certificate of Authenticity

Description

This exceptional A-grade Rock Crystal Quartz specimen from Brazil is a naturally formed high-grade mineral renowned for its clarity, brilliance, and purity. Known to collectors and crystal enthusiasts worldwide, Brazilian Quartz is regarded as among the finest in the world. This carefully selected piece displays superb transparency and luster, with distinctive prismatic crystal growth typical of top-quality quartz from the renowned Minas Gerais mineral fields.

Each specimen is a 100% genuine natural crystal, and the exact piece shown in the photographs is the one you will receive. A Certificate of Authenticity is included with your purchase, guaranteeing that your crystal is authentic and untreated. The scale cube in the photo measures 1 cm, allowing you to accurately judge the full dimensions of the piece.

Geological Background

Quartz (SiO₂), one of the most abundant minerals on Earth, belongs to the tectosilicate subclass of silicate minerals and crystallises in the trigonal crystal system. This Rock Crystal variety represents the purest form of quartz, free from inclusions or impurities that cause colour variations in other quartz types such as amethyst or citrine.

The specimen originates from the Minas Gerais region of Brazil, a globally significant mineralogical province known for producing some of the most flawless quartz and tourmaline crystals on record. The quartz crystals in this area formed within hydrothermal veins under low-pressure, high-temperature conditions during the Cretaceous–Tertiary geological period, as silica-rich fluids circulated through fractures in ancient granitic host rocks. Over time, these fluids cooled and deposited layers of quartz that grew into the perfectly terminated crystals seen in this specimen.

Mineralogical Features

This crystal exhibits the typical hexagonal prism and pyramidal termination structure characteristic of well-formed quartz. Under magnification, faint horizontal striations can be observed on the prism faces — a hallmark of natural quartz growth. The crystal’s optical clarity and vitreous lustre classify it as High Grade or Collector Grade, making it ideal for both display and metaphysical purposes.

Its internal clarity allows for excellent light transmission and refraction, giving it a natural brilliance when viewed under direct light. The crystal is piezoelectric, generating an electrical charge when mechanically stressed — a property that has made quartz a key component in modern technologies such as watches, oscillators, and optical instruments.

Scientific and Collectible Value

From a geological standpoint, this specimen is a textbook example of macrocrystalline quartz formation. It represents the final stage of silica crystallisation from a hydrothermal system and demonstrates the perfect crystalline geometry that forms when environmental conditions remain stable over long geological timescales.

Collectors value Brazilian Rock Crystal for its unmatched purity and transparency. This specimen’s natural formation, unpolished termination, and balanced proportions make it particularly desirable for anyone seeking a museum-quality example of quartz.

Authenticity and Presentation

All of our specimens are 100% genuine natural minerals and come with an official Certificate of Authenticity. The photographs show the exact crystal you will receive — not a stock image. The scale cube equals 1 cm, providing accurate size reference for collectors and display planning.

This A-grade Rock Crystal from Brazil combines geological significance, natural beauty, and scientific integrity — a timeless addition to any fossil, mineral, or gemstone collection.