Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co. Hardness and toughness Gem and mineral hardness is measured on the Mohs scale.
A rock is a naturally occurring solid mass of geological materials or aggregate of one or more minerals. A mineral is a naturally occurring, inorganic solid with a definite chemical composition and an ...
Each material has properties that make them good for specific tasks, eg aluminium is lightweight and doesn’t rust, making it suitable for drinks cans. The properties of materials must be ...