Epididymite
A variety of Minerals
What is Epididymite?
Epididymite is a hydrated sodium beryllium silicate. It shares the same chemical composition with eudidymite but with a different crystal structure. The name of it derives from the Greek word "near" and "twin", representing "the relationship with eudidymite" and "the habit that it always occurs in twins" respectively.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Epididymite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Epididymite Localities Map
See where Epididymite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless
- Hardness (Mohs)
- 5.5
- Density
- 2.548 g/cm³
- Streak
- White
- Luster
- Vitreous
- Crystal System
- Orthorhombic
Chemical Properties
- Chemical Formula
- Na2Be2Si6O15 · H2O
- Elements
- Be, H, Na, O, Si
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Epididymite FAQs
How do I identify Epididymite?
Epididymite can be identified by its hardness of 5.5 on the Mohs scale, Colourless color, Vitreous luster, Orthorhombic crystal system. Look for these key characteristics when examining specimens.
What color is Epididymite?
Epididymite typically appears in Colourless. Color can vary depending on impurities and formation conditions.
How hard is Epididymite?
Epididymite has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.
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