no
Between 2 and 3 because its hard enough gypsum but it can not scratch calcite because calcite is harder
No.because calcite is softer then feldspar
Any mineral with a Mohs hardness of 3 or above. Diamond, for instance.
There is no mineral that would satisfy the question. If a mineral is able to scratch feldspar, it would have a Mohs hardness of 6 or above. Fluorite is rated as a 4. It would be impossible for a mineral which scratches feldspar to be unable to scratch fluorite.
Feldspar
No, a paperclip is not hard enough to scratch calcite. Calcite is a mineral with a hardness of 3 on the Mohs scale, while a paperclip is softer and would not be able to scratch calcite.
The object that can scratch appetite but not feldspar is quartz. Quartz has a hardness of 7 on the Mohs scale, while feldspar has a hardness of 6. Therefore, quartz can scratch appetite, which has a hardness of about 5.5, but cannot scratch feldspar.
calcite
Quartz, with a hardness of 7, will scratch calcite, with a hardness of 3.
apatite will not scratch quartz topaz calcite or corundum
No. Orthoclase is a variety of potassium feldspar.