Answer:
Mineral
Gem
Explanation:
Diamond is both a mineral and a gem grade one.
A mineral is a naturally occurring solid with a definite composition and orderly arrangement of its long range crystals.
Diamond is a mineral found naturally in high temperature and pressure zones. It is an allotrope of carbon. It is formed in metamorphic processes.
As a gem, there are four C's that determines whether a material is classified a gem or not;
Diamond is one of the most expensive naturally occurring substance.
