Comparison · Minerals
Benitoite vs Elbaite
Benitoite and Elbaite are easy to confuse because both are minerals. Elbaite is harder (Mohs 7–7.5) than Benitoite (Mohs 6–6.5), so Elbaite will scratch Benitoite and not the other way round. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Benitoite and Elbaite
- Elbaite is harder (Mohs 7–7.5) than Benitoite (Mohs 6–6.5), so Elbaite will scratch Benitoite and not the other way round. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will.
- Benitoite feels noticeably heavier for its size (specific gravity 3.6–3.7 versus 3.0–3.1 for Elbaite).
- Hold a thin edge to the light: Benitoite is Transparent, Elbaite is Transparent to translucent.
- They overlap in blue, clear, and pink, but Elbaite also comes in green, red, and multicolored.
Benitoite vs Elbaite properties
| Property | Benitoite | Elbaite |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 6–6.5 | 7–7.5 |
| Luster | Vitreous | Vitreous |
| Streak | White | White |
| Transparency | Transparent | Transparent to translucent |
| Specific gravity | 3.6–3.7 | 3.0–3.1 |
| Crystal system | Trigonal | Trigonal |
| Common colors | Blue, Colorless, Pink, White | Pink, Green, Blue, Red, Multicolored (watermelon), Colorless |
| Rarity | common | common |
| Typical specimen value | $2–$150+ | $2–$150+ |
Which is more valuable?
Typical specimens of Benitoite and Elbaite trade in a similar range, around $20.
About Benitoite
Benitoite is a rare barium titanium silicate, BaTiSi3O9, notable as one of the few minerals crystallizing in the ditrigonal-dipyramidal class of the hexagonal system. It is best known for its vivid sapphire-blue color and its powerful blue fluorescence under shortwave ultraviolet light. First described in 1907 from California's San Benito County, it later became the official state gemstone of California.
About Elbaite
Elbaite is the most common gem-quality species within the tourmaline mineral group, a complex borosilicate rich in sodium, lithium, and aluminum with the formula Na(Li,Al)3Al6(BO3)3Si6O18(OH)4. It produces one of the widest color ranges of any gem mineral, including pink, green, blue, and the bicolor watermelon tourmaline prized by collectors. Elbaite takes its name from the island of Elba, where fine crystals were first described.
Benitoite vs Elbaite FAQ
Is Benitoite the same as Elbaite?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Elbaite is harder (Mohs 7–7.5) than Benitoite (Mohs 6–6.5), so Elbaite will scratch Benitoite and not the other way round. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will.
How can you tell Benitoite from Elbaite?
Elbaite is harder (Mohs 7–7.5) than Benitoite (Mohs 6–6.5), so Elbaite will scratch Benitoite and not the other way round. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will. Benitoite feels noticeably heavier for its size (specific gravity 3.6–3.7 versus 3.0–3.1 for Elbaite). Hold a thin edge to the light: Benitoite is Transparent, Elbaite is Transparent to translucent.
Which is harder, Benitoite or Elbaite?
Elbaite is harder: Mohs 7–7.5 against Mohs 6–6.5 for Benitoite.
Which is more valuable, Benitoite or Elbaite?
Typical specimens of Benitoite and Elbaite trade in a similar range, around $20.
