Physical features
1. Color- Yellow to brown.
2. Luster- Greasy.
3. Transparency- Transparent to translucent.
4. Hardness- 2.5.
Organic gemstones are those that formed as a result of living processes, such as Amber. Amber is a fossil resin thought to have come from trees, pines, conifers, and some angiosperms. Technically Amber is not a mineral, but is classed as a precious stone. Most amber is less than 100 million years old, but can be considered a fossil. The real fossils are the insects which get trapped in the tree resin (sap). As the resin hardens the insects which are trapped are amazingly preserved in exquisite detail. The inclusion of insects in Amber are rare finds, most Amber does not contain insects, so when ever this happens it's considered to be a remarkable find. Amber can usually be associated with coal and shale deposits around the world. Some of these occurrences can be found in the Dominican Republic, Germany, Canada and the U.S.A..
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