Comparison · Minerals vs Sulfide Minerals
Galena vs Molybdenite
Galena and Molybdenite are easy to confuse. Galena is harder (Mohs 2.5) than Molybdenite (Mohs 1.25), so Galena will scratch Molybdenite and not the other way round. A fingernail (Mohs 2.5) scratches it easily. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Galena and Molybdenite
- Galena is harder (Mohs 2.5) than Molybdenite (Mohs 1.25), so Galena will scratch Molybdenite and not the other way round. A fingernail (Mohs 2.5) scratches it easily.
- Streak color differs: Galena leaves a lead-gray streak on unglazed porcelain, Molybdenite leaves bluish gray.
- Both look metallic, so compare color, tarnish and weight rather than shine.
- Galena feels noticeably heavier for its size (specific gravity 7.4–7.6 versus 4.7 for Molybdenite).
- Hold a thin edge to the light: Galena is Opaque, Molybdenite is opaque.
- Well-formed crystals give it away: Galena is Cubic, Molybdenite is hexagonal.
Galena vs Molybdenite properties
| Property | Galena | Molybdenite |
|---|---|---|
| Type | Minerals | Sulfide Minerals |
| Mohs hardness | 2.5 | 1.25 |
| Luster | Metallic, bright | metallic |
| Streak | Lead-gray | Bluish gray |
| Transparency | Opaque | opaque |
| Specific gravity | 7.4–7.6 | 4.7 |
| Crystal system | Cubic | hexagonal |
| Common colors | Lead-gray, Silvery gray | Lead gray, Bluish gray |
| Rarity | common | uncommon |
| Typical specimen value | $2–$150+ | $8–$250+ |
Which is more valuable?
Molybdenite is usually the more valuable of the two: a typical collector specimen runs about $45 against $20 for Galena, and premium Molybdenite can reach $250 or more.
About Galena
Galena is lead sulfide, PbS, the primary ore of lead and a significant source of silver, crystallizing in the cubic system with a distinctive metallic luster and remarkably high density for its size. Its perfect cubic cleavage produces sharp-edged cubes and stair-stepped fracture surfaces that make it one of the easiest minerals to identify by touch alone. Galena has been mined since antiquity and remains one of the most commercially important sulfide minerals on Earth.
About Molybdenite
Molybdenite is a soft, metallic molybdenum sulfide and the most important ore of molybdenum. It appears as bluish lead-gray flakes, plates, and foliated masses that feel greasy and leave a mark like graphite.
Galena vs Molybdenite FAQ
Is Galena the same as Molybdenite?
No. Galena is a mineral while Molybdenite is a sulfide mineral. Galena is harder (Mohs 2.5) than Molybdenite (Mohs 1.25), so Galena will scratch Molybdenite and not the other way round. A fingernail (Mohs 2.5) scratches it easily.
How can you tell Galena from Molybdenite?
Galena is harder (Mohs 2.5) than Molybdenite (Mohs 1.25), so Galena will scratch Molybdenite and not the other way round. A fingernail (Mohs 2.5) scratches it easily. Streak color differs: Galena leaves a lead-gray streak on unglazed porcelain, Molybdenite leaves bluish gray. Both look metallic, so compare color, tarnish and weight rather than shine.
Which is harder, Galena or Molybdenite?
Galena is harder: Mohs 2.5 against Mohs 1.25 for Molybdenite.
Which is more valuable, Galena or Molybdenite?
Molybdenite is usually the more valuable of the two: a typical collector specimen runs about $45 against $20 for Galena, and premium Molybdenite can reach $250 or more.
