Rainbow Moonstone Rough Crystal India Natural Feldspar Blue Flash Stone 20-40mm

Rainbow Moonstone Rough Crystal India Natural Feldspar Blue Flash Stone 20-40mm

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Genuine Rough Rainbow Moonstone – India Specimen

This listing is for a genuine Rough Rainbow Moonstone crystal specimen from India, sized approximately 20–40mm. The photograph shown represents an example of the actual specimen you will receive. Each piece is carefully chosen for its natural surface character, attractive flash, and collector quality.

Your specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming it is a genuine natural mineral. Full sizing and scale can be seen clearly in the photographs.

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Mineral Type & Scientific Classification

Rainbow Moonstone is a feldspar mineral variety most closely associated with labradorite within the plagioclase feldspar series, rather than true orthoclase moonstone. It is prized for its shimmering optical effects caused by internal structural layering.

Key mineral information:

• Mineral Group: Feldspar (Plagioclase series)

• Common Classification: Rainbow Moonstone (Labradorite variety)

• Crystal System: Triclinic

• Hardness: 6–6.5 on the Mohs scale

• Lustre: Vitreous to pearly

• Transparency: Translucent to opaque

Feldspars are among the most abundant minerals in Earth’s crust, forming essential components of many igneous and metamorphic rocks.

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Optical Effect – Adularescence and Flash

Rainbow Moonstone is famous for its luminous sheen and colourful flashes, produced by light scattering within microscopic layers of feldspar. This phenomenon is closely related to adularescence and labradorescence.

Specimens may display:

• Blue flash

• White silvery glow

• Subtle rainbow-like iridescence

• Shifting colour play under different angles

Because these effects depend on lighting and viewing angle, each rough piece offers a unique visual experience.

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Geological Formation & Indian Origin

Rainbow Moonstone forms in igneous environments, particularly in pegmatites, where slow cooling allows feldspar crystals to develop their layered internal structures. These geological settings are often rich in other silicate minerals.

India is one of the best-known sources of rainbow moonstone, producing material valued for its strong blue flash and attractive natural appearance.

Associated minerals in pegmatitic deposits may include:

• Quartz

• Mica

• Tourmaline

• Garnet

• Other feldspar varieties

The natural rough form preserves the stone’s geological character, showing its original mineral structure before polishing or cutting.

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Rough Specimen Characteristics

This listing is for a rough, unpolished rainbow moonstone specimen. Rough pieces are especially appreciated by collectors and lapidary enthusiasts because they retain their natural surface textures and raw mineral appeal.

Typical features may include:

• Natural fracture planes

• Layered feldspar structure

• Uneven surfaces from extraction

• Flash visible on certain faces

Each specimen is completely natural and untreated, with any variations in texture or inclusions reflecting authentic formation processes.

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Size & Display Appeal (20–40mm)

With a size range of approximately 20–40mm, this rough rainbow moonstone is ideal for:

• Mineral and crystal collections

• Display trays and specimen boxes

• Lapidary or carving projects

• Educational geology study sets

• Unique gifts for collectors

Its compact size makes it easy to store or showcase while still offering attractive optical effects.

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Collecting & Traditional Associations (Non-Medical)

Rainbow Moonstone has long been admired for its luminous appearance and is traditionally associated in spiritual folklore with intuition and lunar symbolism. This listing presents the specimen strictly as a natural feldspar mineral collectible, without any medical or outcome-based claims.

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Authenticity & Product Details

• Genuine Rough Rainbow Moonstone specimen

• Origin: India

• Size Range: Approximately 20–40mm

• Natural feldspar with blue flash and sheen

• Carefully selected collector piece

• Includes Certificate of Authenticity lifetime guarantee generic card

• Photo shows an example of the actual specimen you will receive

A striking rough rainbow moonstone from India, offering natural feldspar beauty, geological interest, and distinctive colour flash for collectors and enthusiasts.