Comparison · Minerals
Analcime vs Datolite
Analcime and Datolite are easy to confuse because both are minerals. Both sit near Mohs 5–5.5, 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 Analcime and Datolite
- Both sit near Mohs 5–5.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Datolite feels noticeably heavier for its size (specific gravity 2.9–3.0 versus 2.24–2.29 for Analcime).
- They overlap in clear, pink, and green, but Analcime also comes in gray and Datolite also comes in yellow.
- Well-formed crystals give it away: Analcime is Isometric, Datolite is Monoclinic.
Analcime vs Datolite properties
| Property | Analcime | Datolite |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 5–5.5 | 5–5.5 |
| Luster | Vitreous | Vitreous, slightly greasy |
| Streak | White | White |
| Transparency | Transparent to translucent | Transparent to translucent |
| Specific gravity | 2.24–2.29 | 2.9–3.0 |
| Crystal system | Isometric | Monoclinic |
| Common colors | Colorless, White, Gray, Pink, Pale green | Colorless, White, Pale green, Yellow, Pink |
| Rarity | common | common |
| Typical specimen value | $2–$150+ | $2–$150+ |
Which is more valuable?
Typical specimens of Analcime and Datolite trade in a similar range, around $20.
About Analcime
Analcime is a hydrated sodium aluminosilicate, NaAlSi2O6·H2O, and one of the few zeolites to crystallize in the isometric system rather than a lower-symmetry one. It typically forms trapezohedral crystals with twenty-four faces, giving specimens a distinctive rounded, many-sided appearance. Chemically it sits at the boundary between the zeolite and feldspathoid mineral groups.
About Datolite
Datolite is a calcium borosilicate mineral crystallizing in the monoclinic system, typically found as glassy, pale green to colorless crystals or as compact, porcelain-like nodules infilling cavities in basalt. It forms primarily through low-temperature hydrothermal activity following the cooling of basaltic lava flows. Its association with native copper deposits in Michigan's Keweenaw Peninsula has made it a favorite among mineral collectors in the region.
Analcime vs Datolite FAQ
Is Analcime the same as Datolite?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 5–5.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Analcime from Datolite?
Both sit near Mohs 5–5.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Datolite feels noticeably heavier for its size (specific gravity 2.9–3.0 versus 2.24–2.29 for Analcime). They overlap in clear, pink, and green, but Analcime also comes in gray and Datolite also comes in yellow.
Which is harder, Analcime or Datolite?
They are about equally hard, both near Mohs 5–5.5.
Which is more valuable, Analcime or Datolite?
Typical specimens of Analcime and Datolite trade in a similar range, around $20.
