Rock And Gem Identification Guide

Marble containing hematite is red.

Rock and gem identification guide.

Rock identification guide complete with photos and information about each rock s distinguishing characteristics this rock identification guide has been designed to assist you in identifying the rocks provided in the deeper and deeper and mining matters ii kits. Rock identification chart once you ve determined what type of rock you ve got look closely at its color and composition. The highest grade calcite marble is pure white. Picture identification guide for polished stones and tumbled rocks these photos will give you some idea of what various stones look like but other types of stones can have a very similar appearance.

Marble is a crystalline rock composed predominantly of calcite dolomite or serpentine minerals. Positive identification requires much more than looking at a photo. It is a common iron ore and is often used in jewelry and other decorative items. Our mining rough contains gems and minerals that were mined in countries as far away as brazil peru mexico india and madagascar.

Gemstones in the rough look more like rocks than the polished stones used in jewelry. It was used by the ancient chinese to make the first magnetic compasses. Anyone interested in seeking out and identifying rough gemstones should start by buying an illustrated guide or looking up images online of rough gemstones. Printable tumbled stone identification chart.

The colors of marble vary depending on the impurities within the marble. Interactive guide to hundreds of rocks and minerals. It is strongly magnetic. Soft rock does not scratch steel but will scratch fingernails mohs scale of 3 to 5 5 while very soft rock won t even scratch fingernails mohs scale of 1 to 2.

Follow this handy guide to learn more about your gems rocks minerals our gemstones and minerals traveled across the world to become a part of your collection. The chemical formula is fe 3 o 4. An interactive reference guide to rocks minerals and gemstones. Magnetite is sometimes called lodestone.

It has a hardness of 3 4. If your specimen is a rock you will need to identify the individual minerals that compose it by following the mineral identification guide below. The mineral and gemstone kingdom is a free informational and educational guide to rocks minerals gemstones and jewelry. Hematite is one of the most prevalent and useful forms of iron on our planet.