Comparison · Materials
Blue Goldstone vs Glass
Blue Goldstone and Glass are easy to confuse because both are materials. Both sit near Mohs 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 Blue Goldstone and Glass
- Both sit near Mohs 5.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Hold a thin edge to the light: Blue Goldstone is opaque, Glass is translucent.
- They overlap in blue, but Glass also comes in green, brown, and clear.
Blue Goldstone vs Glass properties
| Property | Blue Goldstone | Glass |
|---|---|---|
| Type | Materials | Materials |
| Mohs hardness | 5.5 | 5.5 |
| Luster | vitreous | vitreous |
| Streak | White to colorless | White to colorless |
| Transparency | opaque | translucent |
| Specific gravity | 2.5 | 2.5 |
| Crystal system | amorphous | amorphous |
| Common colors | Dark Blue, Navy, Sparkly, Metallic specks | Green, Brown, Clear, Blue, White, Frosted |
| Rarity | common | common |
| Typical specimen value | $3–$80+ | $1–$40+ |
Which is more valuable?
Blue Goldstone is usually the more valuable of the two: a typical collector specimen runs about $15 against $5 for Glass, and premium Blue Goldstone can reach $80 or more.
About Blue Goldstone
Blue Goldstone is a manufactured dark blue aventurine glass with tiny sparkling metallic inclusions.
About Glass
Glass is a man-made amorphous material. Surf-tumbled sea glass and weathered bottle shards are among the most common glassy finds mistaken for natural minerals.
Blue Goldstone vs Glass FAQ
Is Blue Goldstone the same as Glass?
No. Both are materials, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 5.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Blue Goldstone from Glass?
Both sit near Mohs 5.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Hold a thin edge to the light: Blue Goldstone is opaque, Glass is translucent. They overlap in blue, but Glass also comes in green, brown, and clear.
Which is harder, Blue Goldstone or Glass?
They are about equally hard, both near Mohs 5.5.
Which is more valuable, Blue Goldstone or Glass?
Blue Goldstone is usually the more valuable of the two: a typical collector specimen runs about $15 against $5 for Glass, and premium Blue Goldstone can reach $80 or more.
