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Todas las subastas / Etnográfica / Cluster of Crystalline Quartz Points - Lemurian Quartz...
Collection-specimen with well-formed primary crystals and notable transparency — This specimen represents a remarkable cluster of Milky Quartz (macrocrystalline variety of silicon dioxide, SiO2), characterized by its natural formation and crystal transparency. The crystals, developed according to the trigonal crystal system, display the typical striated prismatic faces and pyramidal terminations, indicating uninterrupted growth inside a geode cavity or a hydrothermal vein. The matrix, also quartz-rich but in a more massive and granular form, serves as the natural base for the aggregate. Visual analysis reveals primary crystals of significant size, flanked by smaller secondary formations that enrich the piece’s complexity. The transparency of many apices is high, allowing observation of internal inclusions, predominantly liquid or two-phase, indicative of the growth conditions. The color is typically colorless (milky), with some zones showing a light milky opacity at the base of the larger crystals, fading to absolute clarity at the terminations. The provenance from Brazilian deposits is a distinctive mark for high-quality Milky Quartz. Brazil is renowned for its extensive quartz formations, often arising from hydrothermal processes associated with igneous and metamorphic rocks. Slow crystallization in stable environments has allowed the development of specimens of this caliber, with a robust structure and remarkable crystal integrity. This piece offers an opportunity for geological study on the dynamics of quartz crystal growth. Esthetically, the cluster is balanced, with a harmonious arrangement of the crystals emerging from the matrix. The vitreous luster is exceptional, and the crystals interact with light in a spectacular way, creating internal and external reflections that enhance its three-dimensionality. The terminations are well preserved, with no evident signs of impact or alteration, though slight signs of growth or contact with surrounding rock are natural and attest to its geological authenticity. The piece is supplied with a metal support that enhances its verticality and facilitates display. The state of conservation is excellent, with minimal signs of handling, demonstrating meticulous care in extraction and transport. A specimen of such weight and size, with crystals so well defined and transparent, is of notable interest to collectors who appreciate the purity and morphological integrity of quartz. Its presence in a collection can serve as both a striking aesthetic piece and a didactic reference for the study of quartz mineralogy. This cluster stands out for its significant mass and the crystal quality of the individual elements, placing it in a superior category compared to common specimens. The combination of size, clarity, and the natural arrangement of the crystals makes it an ideal display piece, capable of enriching any collection focused on aesthetic minerals and prominent crystal formations. Its robustness and the intrinsic nature of quartz make it a durable and highly valuable investment.
Estimación:€2,200
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Estimación:
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