Comparison · Quartz Family vs Oxide Minerals
Quartz vs Rutile
Quartz and Rutile are easy to confuse. 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 Quartz and Rutile
- Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Streak color differs: Quartz leaves a white streak on unglazed porcelain, Rutile leaves pale brown to yellowish.
- Rutile feels noticeably heavier for its size (specific gravity 4.25 versus 2.65 for Quartz).
- Hold a thin edge to the light: Quartz is Transparent to translucent, Rutile is translucent.
- They overlap in yellow, black, and brown, but Quartz also comes in clear, purple, pink, and gray and Rutile also comes in red.
- Well-formed crystals give it away: Quartz is Trigonal, Rutile is tetragonal.
Quartz vs Rutile properties
| Property | Quartz | Rutile |
|---|---|---|
| Type | Quartz Family | Oxide Minerals |
| Mohs hardness | 7 | 6.5 |
| Luster | Vitreous, greasy on fracture surfaces | adamantine |
| Streak | White | Pale brown to yellowish |
| Transparency | Transparent to translucent | translucent |
| Specific gravity | 2.65 | 4.25 |
| Crystal system | Trigonal | tetragonal |
| Common colors | Colorless, White, Purple (amethyst), Yellow (citrine), Pink (rose), Brown/black (smoky) | Reddish brown, Black, Golden yellow, Red |
| Rarity | common | common |
| Typical specimen value | $5–$250+ | $10–$600+ |
Which is more valuable?
Rutile is usually the more valuable of the two: a typical collector specimen runs about $80 against $35 for Quartz, and premium Rutile can reach $600 or more.
About Quartz
Quartz is silicon dioxide, SiO2, one of the most abundant minerals in Earth's continental crust, crystallizing in the trigonal division of the hexagonal crystal system with a hardness of 7 that makes it a standard reference point on the Mohs scale. Its six-sided prismatic crystals, often terminated by pyramidal points, are among the most recognizable crystal shapes in mineralogy. Quartz occurs in nearly every rock type and geologic setting, from granite pegmatites to sedimentary sandstones to hydrothermal veins.
About Rutile
Rutile is a titanium dioxide mineral known for its high luster, deep reddish-brown to black color, and slender prismatic or needle-like crystals. It frequently occurs as golden or coppery needle inclusions within quartz, producing the popular rutilated quartz.
Quartz vs Rutile FAQ
Is Quartz the same as Rutile?
No. Quartz is a quartz family while Rutile is a oxide mineral. 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 Quartz from Rutile?
Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Streak color differs: Quartz leaves a white streak on unglazed porcelain, Rutile leaves pale brown to yellowish. Rutile feels noticeably heavier for its size (specific gravity 4.25 versus 2.65 for Quartz).
Which is harder, Quartz or Rutile?
Quartz is harder: Mohs 7 against Mohs 6.5 for Rutile.
Which is more valuable, Quartz or Rutile?
Rutile is usually the more valuable of the two: a typical collector specimen runs about $80 against $35 for Quartz, and premium Rutile can reach $600 or more.
