Fire Agate
A variety of Chalcedony
Uncommon
What is Fire Agate?
Fire Agate is a rare, semi-precious stone that gets its beautiful colors and fire-like appearance from hematite particles within the rock. When the light enters it, this unusual gem produces iridescent colors that change as the light source is moved. Fire Agate is known as a birthstone of the Zodiac sign of Aries.
Optical Properties
- Refractive Index
- 1.530-1.543
- Birefringence
- 0.003-0.009
- Pleochroism
- None
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Fire Agate Market Value Calculator
Estimate the market value of Fire Agate using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Fire Agate Localities Map
See where Fire 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: Fire 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 Fire Agate?
Quick Facts
Physical Properties
- Color
- Orange, yellow, brown, red, yellow, blue, iridescent
- 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
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