Diamond will scratch anything.
diamond
orthoclase
A few minerals that do not scratch glass come to mind . . . talc, asbestos, mica, for instance.
topaz
No. The hardness of serpentine is 3-4.5, whereas a hardness of at least 7 is needed to scratch glass.
not diamond
diamond
orthoclase
diamond
A few minerals that do not scratch glass come to mind . . . talc, asbestos, mica, for instance.
quartz
n
window glass
Window Glass
topaz
No. The hardness of serpentine is 3-4.5, whereas a hardness of at least 7 is needed to scratch glass.
apatite with a steel knife feldspar with window glass