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Orthoceras are common and have global distribution, occurring in any marine rock, especially limestone. These are slender, elongate shells with th middle of the body chamber transversely constricted and as subcentral orthochoantic siphuncle. The surface is ornamented by a network of fine lirae.

From: Ollinghouse Mine, Washoe country, Nevada,

Hardness: 2.5 - 3 on the mohr's scale.

Gold is a dense, soft, shiny, malleable and ductile metal. It has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements solid under standard conditions. The metal therefore occurs often in free elemental (native) form, as nuggets or grains in rocks, in veins and in alluvial deposits. Less commonly, it occurs in minerals as gold compounds, usually with tellurium.

Goniatites are an extinct order of ammonoid and a cousin to the well known ammonites. The existed from the Devonian through to the Permian. They then became extinction following the Permian mass extinction and they were replaced by the ammonites during the Mesozoic.

These are sold singually

From: Derbyshire, UK.

Hardness: 4 on the mohr's scale

Fluorite is a halide mineral composed of calcium fluoride. Fluorite may occur as a vein deposit, especially with metallic minerals, where it often forms a part of the gangue (the surrounding "host-rock" in which valuable minerals occur) and may be associated with galena, sphalerite, barite, quartz, and calcite. It is a common mineral in deposits of hydrothermal origin and has been noted as a primary mineral in granites and other igneous rocks and as a common minor constituent of dolostone and limestone.