Rock And Gem Identification Guide

Printable tumbled stone identification chart.

Rock and gem identification guide.

Positive identification requires much more than looking at a photo. Magnetite is sometimes called lodestone. The highest grade calcite marble is pure white. Impurities may cause the marbel to be green red blue yellow etc.

The chemical formula is fe 3 o 4. Hematite is one of the most prevalent and useful forms of iron on our planet. Marble is a crystalline rock composed predominantly of calcite dolomite or serpentine minerals. Gemstones in the rough look more like rocks than the polished stones used in jewelry.

Anyone interested in seeking out and identifying rough gemstones should start by buying an illustrated guide or looking up images online of rough gemstones. It is strongly magnetic. The mineral and gemstone kingdom is a free informational and educational guide to rocks minerals gemstones and jewelry. If your specimen is a rock you will need to identify the individual minerals that compose it by following the mineral identification guide below.

Rock identification chart once you ve determined what type of rock you ve got look closely at its color and composition. It was used by the ancient chinese to make the first magnetic compasses. Our mining rough contains gems and minerals that were mined in countries as far away as brazil peru mexico india and madagascar. 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.

It has a hardness of 3 4. Marble containing hematite is red. 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. The colors of marble vary depending on the impurities within the marble.

Interactive guide to hundreds of rocks and minerals. 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. This site has been providing detailed information and photos of hundreds of mineral and gemstone since 1997 and is one of the leading education resources on minerals and gemstones. Once you have identified the relative abundance of different minerals in your rock you can come see examples of common upstate rocks at the museum or you can refer to an online or other reference.