Petrographic classroom collection: 20 rocks

20 rock-forming mineralsSpecimens: approx. 20 x 20 mmin a plastic collector's boxcan be paired with P05This collection contains: quartz, microcline, albite, leucite, sodalite, diopside, augite, actinolite, hornblende, olivine, muscovite, biotite, calcite, magnesite, andalusite, sillimanite, disthene, staurolite, epidote, and garnet.The pieces are numbered according to an explanatory list of contents.Our collections are handcrafted in our workshop in Bonn. Please note that rocks are natural products and no two pieces will ever look exactly alike.Colors in product photos may vary slightly from those of the actual piece due to technical reasons. Our images are provided as reference; upon purchase, you will receive a collection of equivalent quality.

Only in german language available!

The Mohs scale of mineral hardness is a helpful tool for identifying minerals.Standard Mohs scale with nine reference minerals, a white streak plate, and instructions.Delivered in a sturdy wooden collection box.Handcrafted at Dr. F. Krantz in Bonn, Germany.How to use a Mohs scale? Watch on Youtube!Measures: 18.5 x 11.5 x 5.5 cm (7 x 4.5 x 2.2 inches)Size of minerals: approx. 2.5 x 3 cm (1 x 1.2 inches) Colors in product photos may vary slightly from those of the original product due to technical reasons. Our images serve as a reference; when you purchase, you will receive a product of equivalent quality.

Unglazed porcelain tile for determining the streak color (powder color) of a mineral. For light-colored minerals, we recommend a black streak plate, a white plate is suitable for dark minerals in order to clearly see the streak.Size: 50 x 50 x 3 mmColor: whiteMaterial: hard porcelainColors on product pictures may differ from those of the original product due to technical reasons. Our images are for reference only, upon purchase you will receive one product of equivalent quality.