Comparison · Minerals
Benitoite vs Beryl
Benitoite and Beryl are easy to confuse because both are minerals. Beryl is harder (Mohs 7.5–8) than Benitoite (Mohs 6–6.5), so Beryl 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 Beryl
- Beryl is harder (Mohs 7.5–8) than Benitoite (Mohs 6–6.5), so Beryl 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 2.63–2.92 for Beryl).
- Hold a thin edge to the light: Benitoite is Transparent, Beryl is Transparent to translucent.
- They overlap in blue, clear, and pink, but Beryl also comes in green and yellow.
- Well-formed crystals give it away: Benitoite is Trigonal, Beryl is Hexagonal.
Benitoite vs Beryl properties
| Property | Benitoite | Beryl |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 6–6.5 | 7.5–8 |
| Luster | Vitreous | Vitreous |
| Streak | White | White |
| Transparency | Transparent | Transparent to translucent |
| Specific gravity | 3.6–3.7 | 2.63–2.92 |
| Crystal system | Trigonal | Hexagonal |
| Common colors | Blue, Colorless, Pink, White | Green (emerald), Blue (aquamarine), Pink (morganite), Yellow (heliodor), Colorless (goshenite) |
| Rarity | common | common |
| Typical specimen value | $2–$150+ | $2–$150+ |
Which is more valuable?
Typical specimens of Benitoite and Beryl 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 Beryl
Beryl is a beryllium aluminum cyclosilicate, Be3Al2Si6O18, that crystallizes in the hexagonal system as six-sided prisms. Pure beryl is colorless, but trace elements produce a family of well-known gem varieties, including green emerald, blue-green aquamarine, and pink morganite. It typically forms in granite pegmatites, where slow cooling allows large, well-formed crystals to develop.
Benitoite vs Beryl FAQ
Is Benitoite the same as Beryl?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Beryl is harder (Mohs 7.5–8) than Benitoite (Mohs 6–6.5), so Beryl 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 Beryl?
Beryl is harder (Mohs 7.5–8) than Benitoite (Mohs 6–6.5), so Beryl 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 2.63–2.92 for Beryl). Hold a thin edge to the light: Benitoite is Transparent, Beryl is Transparent to translucent.
Which is harder, Benitoite or Beryl?
Beryl is harder: Mohs 7.5–8 against Mohs 6–6.5 for Benitoite.
Which is more valuable, Benitoite or Beryl?
Typical specimens of Benitoite and Beryl trade in a similar range, around $20.
