Description
A Grade Giant Amethyst Cluster Slab – Brazilian Quartz Statement Specimen
This A Grade Giant Amethyst Cluster Slab from Brazil is a powerful statement mineral specimen, showcasing richly coloured purple quartz crystals in an impressive natural formation. Selected for its depth of colour, crystal definition, and overall visual impact, this piece is designed to stand out as a centrepiece in any serious mineral collection or interior display.
You will receive the exact specimen shown in the photographs. This crystal has been carefully chosen for its aesthetic balance, crystal quality, and structural integrity. Full sizing is available in the listing photos. This is a genuine specimen and includes a fully hand-signed Premium Certificate of Authenticity.
Mineral Identity & Crystal Classification
Amethyst is the purple variety of quartz, composed of silicon dioxide (SiO₂). It crystallises in the trigonal crystal system and typically forms six-sided prismatic crystals terminating in pyramidal points. The characteristic violet to deep purple colour is caused by trace amounts of iron within the quartz structure combined with natural irradiation during formation.
In cluster form, amethyst crystals grow together on a shared matrix, often lining cavities within volcanic rock. The slab format exposes a cross-section of this natural growth, allowing the crystal faces to remain intact while presenting a stable display surface.
Quartz is one of the most abundant and studied minerals in geology, yet high-grade amethyst clusters with strong colour saturation remain highly sought after by collectors.
Geological Formation – Brazilian Volcanic Deposits
Brazil is internationally renowned for producing some of the world’s finest amethyst. Most Brazilian amethyst forms within basalt geodes created by ancient volcanic activity. As lava cooled, gas bubbles became trapped within the rock, forming hollow cavities.
Over time, silica-rich hydrothermal fluids entered these cavities and slowly crystallised along the interior walls. Under the right chemical conditions, iron impurities and natural radiation produced the purple hues that define amethyst.
The giant cluster slab format typically originates from large geodes that have been carefully opened and sectioned to reveal the internal crystal growth. This process preserves the natural crystal terminations while creating a flat base or back suitable for stable display.
Colour, Clarity & Crystal Features
This A Grade specimen displays:
• Rich violet to deep purple crystal points
• Well-defined natural terminations
• Dense crystal coverage across the slab surface
• Sparkling vitreous lustre under light
• Subtle natural zoning in some crystals
Colour intensity may vary slightly across the piece, which is normal in natural amethyst and adds visual depth. The interplay of light across the crystal faces enhances brilliance and highlights the geometric symmetry of the quartz points.
Statement Display & Collector Appeal
A Giant Amethyst Cluster Slab is more than a mineral specimen; it is a focal display piece. Its scale and colour presence make it ideal for:
• Premium mineral collections
• Interior décor statement displays
• Office or reception centrepieces
• Educational geological exhibits
• High-impact gift pieces
In spiritual traditions, amethyst is traditionally associated with calmness and clarity; these interpretations are cultural and belief-based rather than scientific or medical claims.
The slab format allows the cluster to sit securely while showcasing the full crystal face, making it both practical and visually impressive.
Authenticity & Presentation
• Genuine A Grade Amethyst (Quartz SiO₂) specimen
• Origin: Brazil
• Trigonal crystal system
• Natural volcanic geode formation
• Giant cluster slab statement piece
• Exact specimen shown – you will receive this crystal
• Includes fully hand-signed Premium Certificate of Authenticity
• Full sizing available in listing photographs
A carefully selected Brazilian Giant Amethyst Cluster Slab offering exceptional colour, natural crystal formation, and commanding collector presence.








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