Comparison · Silicate Minerals
Spodumene vs Sugilite
Spodumene and Sugilite are easy to confuse because both are silicate minerals. Both sit near Mohs 6.75, 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 Spodumene and Sugilite
- Both sit near Mohs 6.75, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Hold a thin edge to the light: Spodumene is transparent, Sugilite is translucent.
- They overlap in pink, purple, and yellow, but Spodumene also comes in green and clear and Sugilite also comes in brown.
- Well-formed crystals give it away: Spodumene is monoclinic, Sugilite is hexagonal.
Spodumene vs Sugilite properties
| Property | Spodumene | Sugilite |
|---|---|---|
| Type | Silicate Minerals | Silicate Minerals |
| Mohs hardness | 6.75 | 6 |
| Luster | vitreous | vitreous |
| Streak | White | White |
| Transparency | transparent | translucent |
| Specific gravity | 3.15 | 2.74 |
| Crystal system | monoclinic | hexagonal |
| Common colors | Pink, Lilac, Green, Yellow, Colorless | Purple, Violet, Magenta, Pink, Brownish yellow |
| Rarity | uncommon | rare |
| Typical specimen value | $10–$800+ | $15–$1200+ |
Which is more valuable?
Sugilite is usually the more valuable of the two: a typical collector specimen runs about $150 against $110 for Spodumene, and premium Sugilite can reach $1200 or more.
About Spodumene
Spodumene is a lithium aluminum pyroxene found in granite pegmatites. It forms flattened prismatic crystals with perfect prismatic cleavage, and its transparent gem varieties include pink-lilac kunzite and green hiddenite.
About Sugilite
Sugilite is a rare lithium-bearing cyclosilicate best known for its vivid purple to magenta gem material. It usually occurs as massive aggregates rather than crystals and is used as an ornamental and lapidary stone.
Spodumene vs Sugilite FAQ
Is Spodumene the same as Sugilite?
No. Both are silicate minerals, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 6.75, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Spodumene from Sugilite?
Both sit near Mohs 6.75, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Hold a thin edge to the light: Spodumene is transparent, Sugilite is translucent. They overlap in pink, purple, and yellow, but Spodumene also comes in green and clear and Sugilite also comes in brown.
Which is harder, Spodumene or Sugilite?
Spodumene is harder: Mohs 6.75 against Mohs 6 for Sugilite.
Which is more valuable, Spodumene or Sugilite?
Sugilite is usually the more valuable of the two: a typical collector specimen runs about $150 against $110 for Spodumene, and premium Sugilite can reach $1200 or more.
