Rainbow Moonstone Obelisk Point 85-100mm Feldspar Crystal Polished Tower Natural Moonstone Gemstone Display Specimen with Certificate

Description

Product Overview
This Rainbow Moonstone obelisk point is a genuine feldspar crystal specimen, expertly shaped into a polished tower form measuring approximately 85–100mm. Carefully selected for its visual quality and natural optical effects, this piece displays the distinctive flashes of colour associated with Rainbow Moonstone. Supplied with a Certificate of Authenticity lifetime guarantee card, the listing photograph shows an example of the specimen you will receive, with each piece offering its own unique internal features and colour play. Please refer to the images for full sizing and scale.

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Mineral Identification and Composition
Rainbow Moonstone is a trade name commonly used for a variety of transparent to translucent white labradorite, which belongs to the feldspar group. Its chemical composition is a sodium calcium aluminium silicate (NaAlSi₃O₈ – CaAl₂Si₂O₈ series), placing it within the plagioclase feldspar family.

The defining feature of Rainbow Moonstone is its optical phenomenon known as labradorescence, where light interacting with internal lamellar structures produces flashes of blue, and occasionally other spectral colours. This effect distinguishes it from traditional orthoclase moonstone, which displays adularescence rather than labradorescence.

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Crystal Structure and Physical Properties
Rainbow Moonstone crystallises in the triclinic crystal system and is typically found in massive form rather than distinct crystal shapes. When cut and polished into an obelisk point, the internal structure becomes more visible, enhancing the optical effects.

Typical properties include:

• Colour: White to milky with flashes of blue, rainbow, or iridescent sheen

• Lustre: Vitreous with pearly reflections

• Transparency: Translucent to semi-transparent

• Hardness: Approximately 6–6.5 on the Mohs scale

The polished obelisk shape maximises the interaction of light across multiple surfaces, allowing the internal flashes to be seen from different angles.

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Geological Formation and Occurrence
Rainbow Moonstone forms in igneous environments, particularly within pegmatites and feldspar-rich intrusive rocks. During slow cooling, alternating layers of feldspar minerals develop, creating the internal structure responsible for its optical effects.

Notable sources include India, Madagascar, and Sri Lanka, where high-quality material is extracted. These geological regions are known for producing feldspar with strong visual effects and consistent clarity suitable for lapidary work.

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Form and Craftsmanship
This specimen has been shaped into an obelisk point, a classic geometric form featuring a flat base and a tapered, pointed top. The multiple polished faces enhance both the structure and the reflective qualities of the stone.

The careful polishing process brings out the natural sheen and internal flashes without altering the mineral’s composition. Each obelisk is unique, with variations in colour intensity, transparency, and the distribution of labradorescent flashes.

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Appearance and Natural Variation
Each Rainbow Moonstone obelisk displays individual characteristics, including variations in base colour, internal inclusions, and the strength and placement of optical flashes. Some pieces may show vivid blue flashes, while others display more subtle iridescence across different faces.

These variations are a natural result of geological formation and contribute to the individuality and collectable nature of each specimen.

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Uses and Collecting Appeal
Rainbow Moonstone obelisks are highly regarded by mineral collectors and gemstone enthusiasts due to their striking optical properties and refined presentation. Their size and polished form make them suitable for display in mineral collections, decorative settings, or as a unique gift item.

In cultural and non-scientific contexts, Rainbow Moonstone is traditionally associated with intuition and lunar symbolism, often appreciated in spiritual practices. These associations are based on historical and cultural traditions rather than scientific properties.

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Authenticity and Presentation

• Genuine Rainbow Moonstone (Labradorite Feldspar) specimen

• Obelisk point shape, approximately 85–100mm in height

• Polished finish to enhance natural optical effects

• Supplied with a Certificate of Authenticity lifetime guarantee card

• Listing image shows an example of the specimen you will receive

This piece offers a combination of natural geological formation, optical interest, and skilled craftsmanship, making it a standout addition to any mineral collection or display.