Convoluted Jasper
A variety of Jasper
What is Convoluted Jasper?
Convoluted Jasper is a commercial, trading name for a finely polished stone with reddish and brownish bands. The material is usually sold tumbled or carved into hearts.
Optical Properties
- Refractive Index
- 1.54
- Birefringence
- 0.003-0.009
- Pleochroism
- None
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Convoluted Jasper 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.
Convoluted Jasper Localities Map
See where Convoluted Jasper is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Composition of Convoluted Jasper
Silicon Dioxide with inclusions of Iron Oxide
Health & Safety Information
- ⚠️Convoluted Jasper in powdered form can be toxic due to its Crystalline Silica content.
- ⚠️Quartz, silica, crystalline silica and flint are non-toxic materials, but very fine dust containing quartz, known as respirable crystalline silicon (RCS), can cause serious and fatal lung disease. Lapidaries should exercise caution when cutting silica.
- ⚠️Convoluted Jasper is typically non-toxic unless it's in powder form. Long-term exposure to finely ground powder may lead to silicosis. Therefore, when cutting or polishing convoluted Jasper, be sure to wear a dust mask to avoid inhaling its dust.
Quick Facts
Physical Properties
- Color
- Red with white, cream, brown bands
- Hardness (Mohs)
- 6.5 - 7
- Density
- 2.5 - 2.6 g/cm³
- Streak
- Black
- Luster
- Vitreous
- Crystal System
- Trigonal
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Si, O
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Convoluted Jasper FAQs
How do I identify Convoluted Jasper?
Convoluted Jasper can be identified by its hardness of 6.5 - 7 on the Mohs scale, Red with white color, Vitreous luster, Trigonal crystal system. Look for these key characteristics when examining specimens.
What color is Convoluted Jasper?
Convoluted Jasper typically appears in Red with white, cream, brown bands. Color can vary depending on impurities and formation conditions.
How hard is Convoluted Jasper?
Convoluted Jasper has a hardness of 6.5 - 7 on the Mohs scale. This gives it moderate hardness.
What is the composition of convoluted jasper of Convoluted Jasper?
Silicon Dioxide with inclusions of Iron Oxide