Agate Geode – Quartz-Lined, Translucent, Natural – 44g (50 × 18 × 37 mm)

LONG DESCRIPTION
This 44g agate geode originates from an undetermined region, typical of global volcanic environments where silica-rich fluids fill cavities and crystallize over time.
It displays a warm brown outer matrix with a striking internal cavity lined with translucent white quartz crystals. The crystal faces are sharp and well-defined, catching light beautifully.
Dimensions: 50 × 18 × 37 mm.
The contrast between the rough exterior and the sparkling interior makes this specimen a classic example of geode formation, suitable for display, study, or lapidary inspiration.

AGE
Formed during the Cenozoic to Mesozoic Eras, with an estimated age of a few million to tens of millions of years, based on typical agate and quartz geode formation in volcanic host rocks.
Crystals formed slowly within gas bubbles or cavities, atop host rocks that may be hundreds of millions of years old.
This piece is valued for its aesthetic qualities, educational clarity, and lapidary potential.

Technical notes
• Hardness: 6.5–7 (Mohs)
• Luster/Finish: Vitreous crystal faces, matte exterior
• Transparency/Preservation: Translucent quartz interior, natural cavity
• Mineral group: Quartz (SiO₂)
• Crystal habit / Morphology: Drusy quartz lining within agate shell
• Associations / Matrix: Silica-rich volcanic rock
• Composition / Formation: Silica precipitation in volcanic cavities
• Fluorescence: None known
This piece is unpolished, preserving its natural character and making it suitable for display, study, or collection.