Table of Contents
- 1 What can scratch feldspar?
- 2 Can you scratch fluorite?
- 3 Can be scratched by feldspar?
- 4 Can usually be scratched easily with a fingernail?
- 5 Can apatite be scratched?
- 6 Which of the following minerals can scratch by a fingernail?
- 7 Why does fluorrichterite have a pearly luster?
- 8 What kind of calcite is fluorrichterite mixed with?
What can scratch feldspar?
Mineral Hardness Test Video
| Mineral | Hardness |
|---|---|
| Gypsum | |
| SOFT Mineral can be scratched with a fingernail | |
| Pink Feldspar | |
| HARD Mineral cannot be scratched with a steel nail. |
Can you scratch fluorite?
Since Fluorite is a 4 on the scale it means that fluorite can scratch all the minerals below it but not be scratched by them. Talc rates a one on the scale meaning that it is the softest mineral and can be scratched by just about anything.
What can scratch calcite?
A mineral or other material with a higher hardness number can scratch anything with an equal or lower number. Thus, a copper penny can scratch calcite, gypsum and talc, while a fingernail can scratch only gypsum and talc.
What can scratch apatite?
Notice that talc is the softest mineral, while diamond is the hardest. You can easily scratch talc with your fingernail. Apatite, a mineral in the middle of the hardness scale, can scratch glass but can be easily scratched by a knife. Diamond, the hardest mineral, cannot be scratched by any other mineral.
Can be scratched by feldspar?
It can be scratched by topaz, corundum, and diamond. Quartz will scratch minerals that have a lower number on the scale. Fluorite is one….Mohs Hardness Scale.
| Hardness | Mineral |
|---|---|
| 3 | Calcite |
| 4 | Fluorite |
| 5 | Apatite |
| 6 | Orthoclase feldspar |
Can usually be scratched easily with a fingernail?
Terminology. Soft – can be scratched by a fingernail, Mohs’ 1-2; Hard – cannot be scratched by a knife but can scratch glass, Mohs’ 6-9; Diamond is the hardest known mineral, Mohs’ 10.
Can scratch fluorite but Cannot scratch quartz?
It can be scratched by topaz, corundum, and diamond. Quartz will scratch minerals that have a lower number on the scale. Fluorite is one….Mohs Hardness Scale.
| Hardness | Mineral |
|---|---|
| 4 | Fluorite |
| 5 | Apatite |
| 6 | Orthoclase feldspar |
| 7 | Quartz |
Does a fingernail scratch calcite?
Can gypsum be scratched by a fingernail? For example, calcite can scratch gypsum but gypsum cannot scratch calcite. Your fingernail is 2.5 on the hardness scale.
Can apatite be scratched?
Diamond is the hardest mineral; no other mineral can scratch a diamond. Quartz is a 7. It can be scratched by topaz, corundum, and diamond. Quartz will scratch minerals that have a lower number on the scale….Mohs Hardness Scale.
| Hardness | Mineral |
|---|---|
| 4 | Fluorite |
| 5 | Apatite |
| 6 | Orthoclase feldspar |
| 7 | Quartz |
Which of the following minerals can scratch by a fingernail?
Hardness
| mineral | Mohs hardness | observations on the minerals |
|---|---|---|
| talc | 1 | very easily scratched by the fingernail; has a greasy feel |
| gypsum | 2 | can be scratched by the fingernail |
| calcite | 3 | very easily scratched with a knife and just scratched with a copper coin |
| fluorite | 4 | very easily scratched with a knife but not as easily as calcite |
What kind of mineral can you scratch with a fingernail?
Soft – can be scratched by a fingernail, Mohs’ 1-2; Diamond is the hardest known mineral, Mohs’ 10. Can graphite be scratched with a fingernail?
Where can I find fluorrichterite in Ontario?
Fluorrichterite is a rare mineral, known from only one location. It is found near Wilberforce, Ontario in a skarn formation. The skarn is a term for a rock that is the product of a chemically unusual magma body that has intruded into and recrystallized a ” dirty ” limestone.
Why does fluorrichterite have a pearly luster?
One of these is of course, fluorrichterite. Fluorrichterite forms well shaped crystals that can have a pearly luster. Its luster is higher than most members of the amphibole group possibly because of the unusual presence of fluorine which comes from the unusual magma chemistry.
What kind of calcite is fluorrichterite mixed with?
Mixed with fluorrichterite in the white recrystallized calcite of the skarn are well formed crystals of biotite making specimens extra special. Fluorrichterite is a brand new mineral, only receiving official recognition in 1996, although it has been collected for many years by many collectors.