Description
Natural Selenite Crystal Tower – 10cm Polished Gypsum Mineral Specimen
This listing features a genuine Selenite crystal tower measuring approximately 10 cm in height, carefully shaped and polished to highlight the natural fibrous structure and luminous appearance of this well-known gypsum mineral. The tower form enhances the natural visual qualities of the crystal while creating an elegant mineral display piece suitable for collectors, decorative arrangements, or geological collections.
The photographs in this listing show the exact specimen you will receive, allowing you to clearly see the crystal’s natural texture, internal light reflection, and polished faces before purchase. Each piece is individually selected for its visual character and mineral quality.
This crystal includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the specimen is a genuine mineral. Full sizing can be seen in the listing photographs for accurate scale.
Mineral Identification and Geological Classification
Selenite is a transparent to translucent crystalline variety of the mineral gypsum, composed of calcium sulfate dihydrate (CaSO₄·2H₂O). It belongs to the sulfate mineral group and crystallises in the monoclinic crystal system.
The term “Selenite” originates from the Greek word selēnē, meaning “moon,” referencing the mineral’s soft pearly glow when light reflects across its surface. The tower in this listing is made from a fibrous gypsum variety often known as Satin Spar Selenite, which produces a silky optical effect when polished.
Key mineralogical characteristics include:
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Mineral group: Gypsum (Sulfate mineral)
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Chemical composition: Calcium sulfate dihydrate (CaSO₄·2H₂O)
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Crystal system: Monoclinic
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Hardness: 2 on the Mohs scale
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Lustre: Silky to pearly
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Transparency: Translucent
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Crystal habit: Fibrous, tabular, or columnar formations
The fibrous internal structure produces a natural chatoyant effect, where light appears to glide across the surface of the crystal when it is moved.
Formation and Geological Environment
Gypsum minerals such as Selenite typically form in evaporite environments, where mineral-rich water bodies gradually evaporate over time. As the water evaporates, dissolved calcium and sulfate ions crystallise into gypsum deposits.
These geological conditions commonly occur in:
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Ancient inland seas
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Salt lakes
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Evaporating lagoons
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Sedimentary basins
Over long geological periods, thick gypsum deposits can develop within sedimentary rock layers. Fibrous Selenite varieties form when gypsum crystals grow in parallel fibre-like structures, producing the characteristic silky sheen visible in polished specimens.
Large gypsum deposits are found in several regions around the world, often forming extensive beds within evaporite rock formations.
Crystal Structure and Optical Characteristics
The fibrous internal structure of Satin Spar Selenite produces a distinctive optical effect often referred to as chatoyancy, where reflected light appears as a soft glowing band across the surface of the mineral.
When cut and polished into tower form, this structure becomes particularly visible as light travels through the crystal fibres. The polished faces of the tower reveal subtle internal striations and the natural alignment of the crystal growth.
Typical visual characteristics include:
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Milky white to translucent colour
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Silky reflective surface
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Fibrous internal structure
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Linear growth patterns along the length of the crystal
These features are natural results of gypsum crystal growth and are not artificial enhancements.
Tower Shape and Lapidary Preparation
This specimen has been shaped into a tower or obelisk style point, a common lapidary form used to create stable mineral display pieces. The tower design features multiple polished faces that taper to a point, highlighting the crystal’s internal fibrous structure.
The flat base allows the specimen to stand upright on display shelves, desks, or mineral cabinets. This shape is widely appreciated in mineral displays because it allows light to interact with the crystal from multiple angles.
The polishing process enhances the mineral’s natural sheen while maintaining the integrity of the original gypsum material.
Collecting and Decorative Context
Selenite towers are widely appreciated for their distinctive appearance and geological origins. Their translucent glow and soft reflective surface make them visually appealing additions to mineral collections or decorative natural stone displays.
Collectors often include Selenite specimens in mineral cabinets to represent evaporite mineral formations and the sulfate mineral group. The tower format also makes these crystals suitable for display in interior spaces where natural minerals are used as decorative elements.
In various cultural traditions, Selenite crystals are traditionally associated with clarity and reflection, and they sometimes appear in decorative or spiritual environments. These interpretations are based on cultural traditions rather than scientific mineral properties.
Authenticity and Specimen Details
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Genuine Selenite (Gypsum) crystal tower
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Approximate height: 10 cm
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Mineral species: Calcium sulfate dihydrate
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Carefully selected natural specimen
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Exact crystal shown in listing photographs
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Includes Certificate of Authenticity lifetime guarantee generic card
Each Selenite crystal forms naturally through sedimentary geological processes, resulting in unique fibrous structures and subtle variations in translucency that make every specimen individually distinctive.
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