Dendritic Agate
A variety of Chalcedony
Uncommon
What is Dendritic Agate?
Dendritic Agate is a beautiful stone of agate that was named after the small crystals that form divergent, plant-like or tree-like patterns inside the stone. These tiny filaments are actually particles of iron or manganese oxide. Dendritic Agate is associated with the Zodiac sign of Gemini.
Optical Properties
- Refractive Index
- 1.530-1.543
- Birefringence
- 0.003-0.009
- Pleochroism
- None
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Discover Values
Rarity
3.8out of 5.0
76%
Popularity
4.0out of 5.0
80%
Beauty
4.3out of 5.0
86%
Cultural Value
3.9out of 5.0
78%
Collection Value
4.2out of 5.0
84%
Dendritic Agate Market Value Calculator
Estimate the market value of Dendritic Agate using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Dendritic Agate Localities Map
See where Dendritic Agate 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 Agate 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 Agate?
Quick Facts
Physical Properties
- Color
- White to gray, black, brown, colorless, etc.
- Hardness (Mohs)
- 6.5 - 7
- Density
- 2.59 - 2.67 g/cm³
- Streak
- White
- Luster
- Waxy, Vitreous
- Crystal System
- Trigonal
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Si, O
Also Known As
Dendritic AgateMerlinite
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