A gemstone or gem (also called a fine gem, jewel, or a precious or semi-precious
stone) is a piece of mineral crystal, which, in cut and polished form, is used to ...
Jun 6, 2013 ... ... answers your question, what are gemstones? Plus an insight into buying
gemstones, the value of gemstones and how gemstones are formed.
Dec 21, 2007 ... What is the difference between a mineral, a rock and a gemstone? You'll find
some answers here.
There are over two hundred recognised gemstones. Most are minerals and are
cut from naturally occurring crystals. To qualify as a gem, the specimen should be
by Donald Clark, CSM IMG. Emerald, ruby, opal, gems and jewels. These words
have been in our vocabulary for thousands of years. However, defining what a ...
An explanation of how gems are formed, and how and why gem quality crystals
grow and change in nature.
Mar 19, 2012 ... When we speak of gemstones, we usually mean minerals that have been cut and
polished. However, over the ages, humans have used a great ...
Detailed information and photos for over 100 gemstone varieties from around the
Get information, facts, photos, news, videos, and more about minerals and gems
from National Geographic.
Are all gems minerals? A mineral is an inorganic, naturally occurring substance
with distinct chemistry and crystalline structure. Gemstones are materials that ...