Dendritic Jasper
A variety of Jasper
Uncommon
What is Dendritic Jasper?
Dendritic Jasper is an interesting form of Jasper, prized for its unusual pattern that resembles fossilized plants. The fern-like or tree-like filaments are actually inclusions of iron and manganese oxide. Dendritic Jasper is commonly sold in the form of tumbled stones, but it's also used in jewelry.
Optical Properties
- Refractive Index
- 1.54
- Birefringence
- 0.003-0.009
- Pleochroism
- None
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Discover Values
Rarity
4.0out of 5.0
80%
Popularity
3.8out of 5.0
76%
Beauty
4.2out of 5.0
84%
Cultural Value
4.0out of 5.0
80%
Collection Value
4.1out of 5.0
82%
Dendritic Jasper Market Value Calculator
Estimate the market value of Dendritic Jasper using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Dendritic Jasper Localities Map
See where Dendritic Jasper is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Health & Safety Information
- ⚠️Harm Reason: Dendritic Jasper in powdered form can be toxic due to its Crystalline Silica content.
- ⚠️Physical Toxicity: 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.
- ⚠️How to prevent the risks of Dendritic Jasper?
Quick Facts
Physical Properties
- Color
- Red or brown to variably coloured
- Hardness (Mohs)
- 6.5 - 7
- Density
- 2.58 - 2.91 g/cm³
- Streak
- White
- Luster
- Vitreous
- Crystal System
- Trigonal
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Si, O
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