In Mineral & Rock Hall we can see the so called "The World Class" specimens like the gypsum crystal that is more than 3 m in length and 80 cm in diameter, and the intergrowth crystal of fluorite and flower like calcite that weighs more than 1 ton.

The hydrozincite is important source of Zn-element. Its contents are about 60%. It is always formed by upper part of its oxidation belt in Zincite or Pb-Zn ore. This specimen likes look white chrysanthemum or coral skeleton, white, translucent, block hydrozincite is very rare.

Fluorite may be radiated fluorescence in the sunshine. It has gorgeous luster: green, yellow, white, purple etc colors. The crystal is appeared cube, octahedron, also slice, botryoidal, stalactitic etc. aggregates, transparent or semitransparent, sparkling and crystal-clear, magnificent, ever changing, view and admire treasure.

Pyrite is named “fool-Au”. S-bearing 53.4%, often bearing Co, Ni, Au. The crystal is often appeared cube or pyritohedron. The crystal face have stripes, aggregate appearing agranular or block, golden yellow, streak greenish black, metallic luster, hardness 6-6.5, density 4.9-5.2 g/cm3,made H2SO4. It has collected, and view and admire value.

The calcites are often druse aggregate. Its color is mainly milk white or no color. When there are else elements, they have buff, tan, light red, purple and so on. Its crystallization is better, diversified in form, have often rhombohedron , and their aggregate, belongs to triclinic.