Blue Indian Opal with Moss Agate Inclusions

This polished Shiva Lingham is a striking combination of Indian blue common opal and moss agate inclusions, sourced from Rajasthan, India. The soft blue base is contrasted by intricate, organic dendritic patterns, creating a natural landscape-like appearance formed through mineral deposition over time.
The smooth, elongated shape enhances both the visual flow of the patterns and the natural translucency of the material, allowing light to highlight internal structures and colour variation across the surface.

Key Features
Material: Common Opal with Moss Agate inclusions
Composition: Hydrated silica (SiO₂·nH₂O) with microcrystalline quartz inclusions
Colour: Soft blue, grey, white with green-brown dendritic inclusions
Patterning: Moss-like (dendritic) inclusions formed by mineral deposition
Finish: High polish
Form: Shiva Lingham (elliptical, symmetrical shape)
Uniqueness: One-of-a-kind natural patterning

Dimensions
Weight: 76 grams
Approx. Size: ~5.4 cm x 3.1 cm

Geological & Scientific Notes
Blue Opal (Common Opal):
This is a non-precious opal, meaning it does not display play-of-colour. Instead, its soft blue appearance comes from light scattering within hydrated silica spheres.

Moss Agate Inclusions:
The dendritic, moss-like formations are not organic material but are caused by mineral inclusions, typically involving iron, manganese, or other trace elements. In this material, darker inclusions may also involve carbon, sulphur, or titanium compounds, contributing to the contrast.

Formation Process:
This combination forms when silica-rich fluids deposit opal while simultaneously trapping or overgrowing mineral inclusions, creating layered and branching internal structures.

Material Relationship:
Opal: Amorphous hydrated silica
Moss Agate: Microcrystalline quartz (chalcedony)
→ This piece represents a natural interaction between amorphous and crystalline silica forms

Physical Properties
Mineral Class: Mineraloid (Opal) + Chalcedony (Quartz family)
Chemical Formula: SiO₂·nH₂O
Hardness (Mohs): ~5.5–6 (opal), ~6.5–7 (chalcedony inclusions)
Transparency: Translucent to opaque
Lustre: Waxy to vitreous
Structure: Amorphous (opal) with microcrystalline inclusions

Care Information
Avoid prolonged exposure to direct sunlight (can cause dehydration in opal)
Keep away from high heat or very dry environments
Clean gently with lukewarm water and a soft cloth
Avoid chemicals and ultrasonic cleaners
Store separately to prevent scratches

Additional Notes
Often marketed as “Owyhee Blue Opal,” but this material is distinct and originates from India
Each piece is completely unique due to natural inclusion patterns
The polished Shiva Lingham form enhances both durability and display appeal