Diamonds are proven to scratch all minerals including itself.
gypsum can
The human fingernail can just scratch gypsum, but is softer than all other minerals.
The scratch table is called the Mohs Scale of Mineral Hardness and measures the hardness of minerals in relation to the known hardest (diamond) and softest (talc) minerals.
yes.
Emeralds are not actually rocks, but minerals of the beryl family that have gemstone qualities.
Diamond is the hardest naturally occurring mineral and can scratch all other minerals. Talc is the softest of minerals and cannot scratch any other mineral.
Diamonds are proven to scratch all minerals including itself.
Malachite is also green.
it can scratch fluorite
Talc is supposed to be too fragile to cause a scratch on the majority of minerals.
Emeralds are essentially just gem quality beryl's. Another sort of beryl used in jewelry and by gem collectors is aquamarine. Emeralds also fit the criteria of minerals, being inorganic, solid, crystalline, naturally occurring, and having a well defined chemical composition.
Kimberley is renowned for diamonds, but there are gold and emeralds there too.
Emerald is a mineral. Specifically, it is a variant of the mineral known as beryl.
gypsum can
The human fingernail can just scratch gypsum, but is softer than all other minerals.
Quite possibly lots of rubies,emeralds, diamonds and gold.