Comparison · Minerals vs Quartz Family
Axinite vs Smoky Quartz
Axinite and Smoky Quartz are easy to confuse. Both sit near Mohs 6.5–7, 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 Axinite and Smoky Quartz
- Both sit near Mohs 6.5–7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Axinite feels noticeably heavier for its size (specific gravity 3.27–3.35 versus 2.65 for Smoky Quartz).
- Hold a thin edge to the light: Axinite is Transparent to translucent, Smoky Quartz is transparent.
- They overlap in brown and gray, but Axinite also comes in purple, yellow, blue, and green and Smoky Quartz also comes in black.
- Well-formed crystals give it away: Axinite is Triclinic, Smoky Quartz is hexagonal.
Axinite vs Smoky Quartz properties
| Property | Axinite | Smoky Quartz |
|---|---|---|
| Type | Minerals | Quartz Family |
| Mohs hardness | 6.5–7 | 7 |
| Luster | Vitreous | vitreous |
| Streak | White | White |
| Transparency | Transparent to translucent | transparent |
| Specific gravity | 3.27–3.35 | 2.65 |
| Crystal system | Triclinic | hexagonal |
| Common colors | Clove-brown, Violet-brown, Honey-yellow, Gray, Blue (rare), Green (rare) | Brown, Gray, Black |
| Rarity | common | common |
| Typical specimen value | $2–$150+ | $5–$150+ |
Which is more valuable?
Smoky Quartz is usually the more valuable of the two: a typical collector specimen runs about $30 against $20 for Axinite, and premium Smoky Quartz can reach $150 or more.
About Axinite
Axinite is a group name for a series of calcium aluminum borosilicate minerals that crystallize in the triclinic system, producing distinctively thin, wedge-shaped crystals resembling an axe blade, which inspired its name. It typically forms in contact metamorphic zones where granitic intrusions meet boron-rich sedimentary or volcanic rocks. Its sharp-edged crystal habit and clove-brown to violet color make it one of the more visually distinctive borosilicate minerals collectors encounter.
About Smoky Quartz
Smoky quartz is a brown to black variety of quartz colored by natural irradiation. The national gem of Scotland, it ranges from light tan to nearly opaque black.
Axinite vs Smoky Quartz FAQ
Is Axinite the same as Smoky Quartz?
No. Axinite is a mineral while Smoky Quartz is a quartz family. Both sit near Mohs 6.5–7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Axinite from Smoky Quartz?
Both sit near Mohs 6.5–7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Axinite feels noticeably heavier for its size (specific gravity 3.27–3.35 versus 2.65 for Smoky Quartz). Hold a thin edge to the light: Axinite is Transparent to translucent, Smoky Quartz is transparent.
Which is harder, Axinite or Smoky Quartz?
They are about equally hard, both near Mohs 6.5–7.
Which is more valuable, Axinite or Smoky Quartz?
Smoky Quartz is usually the more valuable of the two: a typical collector specimen runs about $30 against $20 for Axinite, and premium Smoky Quartz can reach $150 or more.
