Comparison · Quartz Family
Carnelian vs Fire Agate
Carnelian and Fire Agate are easy to confuse because both are quartz family. Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Carnelian and Fire Agate
- Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Luster is different: Carnelian is vitreous while Fire Agate is waxy.
- They overlap in orange, red, and brown, but Fire Agate also comes in yellow and multicolored.
Carnelian vs Fire Agate properties
| Property | Carnelian | Fire Agate |
|---|---|---|
| Type | Quartz Family | Quartz Family |
| Mohs hardness | 7 | 7 |
| Luster | vitreous | waxy |
| Streak | White | White |
| Transparency | translucent | translucent |
| Specific gravity | 2.6 | 2.6 |
| Crystal system | hexagonal | hexagonal |
| Common colors | Orange, Red-Orange, Reddish-Brown | Brown, Orange, Red, Gold, Iridescent |
| Rarity | common | uncommon |
| Typical specimen value | $5–$150+ | $15–$1000+ |
Which is more valuable?
Fire Agate is usually the more valuable of the two: a typical collector specimen runs about $90 against $25 for Carnelian, and premium Fire Agate can reach $1000 or more.
About Carnelian
Carnelian is a warm-colored variety of chalcedony ranging from pale orange to deep red-brown. It's been used in jewelry for over 4,500 years.
About Fire Agate
Fire Agate is an agate variety with iridescent internal color flashes, usually in warm brown, orange, red, and gold tones.
Carnelian vs Fire Agate FAQ
Is Carnelian the same as Fire Agate?
No. Both are quartz family, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Carnelian from Fire Agate?
Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Luster is different: Carnelian is vitreous while Fire Agate is waxy. They overlap in orange, red, and brown, but Fire Agate also comes in yellow and multicolored.
Which is harder, Carnelian or Fire Agate?
They are about equally hard, both near Mohs 7.
Which is more valuable, Carnelian or Fire Agate?
Fire Agate is usually the more valuable of the two: a typical collector specimen runs about $90 against $25 for Carnelian, and premium Fire Agate can reach $1000 or more.
