Diamond
There are many minerals with hardness above 5.5 but the standard ones are feldspar,quartz, topaz, corundum and diamond.
Any mineral with roughly a hardness of 6 or more on the Mohs scale of mineral hardness could scratch glass, which is roughly 5.5 on the Mohs scale. Some minerals that could scratch glass would be quartz, topaz, corundum, and diamond.
The three minerals that are metals and can scratch glass are iron pyrite (pyrite), hematite, and magnetite. These minerals have a high hardness level, allowing them to scratch glass and show metallic luster.
A few minerals that do not scratch glass come to mind . . . talc, asbestos, mica, for instance.
feldspar, quartz, topaz, corundum, diamond.... Diamond will diffidently scratch glass its also made to cut glass if you get tech with it. (alyssamc6)
The property of rocks that can be determined by whether they scratch glass is their hardness. This is measured on the Mohs scale, which ranks minerals based on their ability to scratch one another. If a rock can scratch glass, it indicates that its hardness is greater than that of glass, which has a hardness of about 5.5 on the Mohs scale. Conversely, if it cannot scratch glass, it is likely to be softer than this standard.
Gneiss, a metamorphic rock composed of granular minerals, typically does not scratch glass. The hardness of gneiss generally ranges between 6 and 7 on the Mohs scale, while glass has a hardness of around 5.5. Therefore, while some minerals within gneiss may be hard enough to scratch glass, the rock itself usually does not have the consistent properties required to do so.
Between 3.5 and 5.5 on the Mohs scale of mineral hardness.
Quartz will scratch glass, as its hardness is usually around 7. Pyrite, on the other hand, has a hardness of 6 to 6.5, meaning it would not be able to scratch glass.
Halite, which has a Mohs hardness of 2.5, can scratch minerals that are softer than it on the hardness scale. This means it can scratch talc (hardness 1) and gypsum (hardness 2). However, it would not be able to scratch minerals like calcite (hardness 3) or any harder minerals.
The mineral would have a hardness between 5.5 and 6.5 on the Mohs scale. It cannot scratch glass (hardness of about 5.5) but can scratch an iron nail (hardness of about 4). This places it in the range of minerals like orthoclase feldspar or apatite.
Most rocks would.