Educational collection: Luster (12 minerals)
€45.00
Currently not available, Delivery time 1-3 days
Product information "Educational collection: Luster (12 minerals)"
- 12 minerals
- Specimens: approx. 20 x 20 mm
- in a collector's case made of plastic
Among the various properties of minerals, “luster” describes how the surface of a
mineral reflects light. This is influenced by both the refractive index and the surface
texture.
This collection illustrates the different types of luster as well as luster quality (metallic,
diamond, vitreous, greasy, pearlescent, porcelain, and silky luster; from matte to brilliant).
The specimens are numbered according to the list of contents.
Our collections are handcrafted at Dr. F. Krantz in Bonn.
Please note that minerals are natural products and no two pieces will ever
look exactly alike.
Due to technical limitations, colors in product photos may vary slightly from those of the original piece.
Our images serve as reference; upon purchase, you will receive a collection of equivalent quality.
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12 mineralsSpecimens: approx. 20 x 20 mmin a segmented plastic collector's case When minerals break into smooth surfaces along specific, parallel planes in the crystal lattice under mechanical pressure, we refer to this property as "cleavage." This property ranges on a scale from highly perfect cleavage to no cleavage at all, as is the case with quartz, for example. This collection showcases the most important types of cleavage using 12 minerals. The specimens are numbered according to the list of contents.Our collections are handcrafted by Dr. F. Krantz in Bonn. Please note that minerals are natural products and no two specimens will ever look exactly alike.Due to technical limitations, colors in product photos may differ slightly from those of the actual specimen. Our images are meant as reference; upon purchase, you will receive one collection of equivalent quality.
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10 MineralsSpecimens: 20 x 20 mm eachin a segmented plastic collector’s boxThe optical properties refer to how light interacts with minerals when observed using various optical techniques. These properties include, for example, transparency, birefringence, pleochroism, and iridescence, which are demonstrated here on selected specimens.This collection is numbered according to the list of contents.Our collections are handcrafted by Dr. F. Krantz in Bonn. Please note minerals are natural products and no two specimens will ever look exactly alike.Due to technical limitations, colors in product photos may vary slightly from those of the actual specimen.Our images are intended as reference; upon purchase, you will receive a collection of equivalent quality.
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15 MineralsHandpiece: approx. 20 x 20 mmin a divided plastic caseThis collection demonstrates the fluorescent properties of certain minerals.The visible glow of some minerals under UV light is called fluorescence. A distinction is made between short-wavelength (approx. 254 nm) and long-wavelength (approx. 366 nm) UV rays, which can produce different colors.The specimens are numbered according to the list of contents.Our collections are handcrafted by Dr. F. Krantz in Bonn. Please note that minerals are natural products and no two pieces will everlook exactly alike.Due to technical limitations, colors in product photos may vary slightly from those of the actual piece.Our images are intended as reference; upon purchase, you will receive a collection of equivalent quality.
Prices incl. VAT plus shipping costs
18 mineralsSpecimens: approx. 20 x 20 mmin a plastic collector’s caseThis collection uses various minerals to demonstrate diamagnetism, paramagnetism, and ferromagnetism, as well as pyroelectricity and piezoelectricity, and provides examples of conductors, non-conductors, and insulators.The specimens are numbered according to the contents list.Our collections are handcrafted by Dr. F. Krantz in Bonn. Please note that minerals are natural products and no two specimens will ever look exactly alike.Due to technical limitations, colors in product photos may vary slightly from those of the actual specimen.Our images are intended as reference; upon purchase, you will receive a collection of equivalent quality.
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15 mineralsspecimens: approx. 20 x 20 mm eachin a plastic collection box with 16 compartments A collection that demonstrates the different specific weights of minerals. From extremely light specimens such as carnalite, to medium-weight specimens such as calcite and fluorite, to extremely heavy minerals such as cinnabar. This classroom collection is delivered in a compartmentalized collection box. The specimens are numbered according to a contents list that includes all relevant data. Our collections are handcrafted at our premises at Dr. F. Krantz in Bonn. Please note that minerals are natural products and no two pieces are ever exactly alike. Colors in product photos may vary slightly from those of the actual specimen due to technical reasons. Our images are for reference; upon purchase, you will receive a collection of equivalent quality.
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9 mineralsspecimens: 20 x 20 mm each in a plastic case with 10 compartments includes a streak plate In mineralogy, the term “streak color” or simply “streak” refers to the color of the powder produced when a mineral is rubbed against a rough, unglazed porcelain surface—such as a streak plate. It is a common method for identifying specimens that appear similar in color. This classroom collection is used to compare the streak color with the intrinsic color of minerals. It comes with a porcelain streak plate.The specimens are numbered according to the contents list. Our collections are handcrafted by Dr. F. Krantz in Bonn. Please note that minerals are natural products and no two specimens will ever look exactly alike. Due to technical limitations, colors in product photos may differ slightly from those of the actual specimen. Our images are for reference; upon purchase you will receive a collection of equivalent quality.
Prices incl. VAT plus shipping costs