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Collections de minéraux
Les échantillons de minéraux sont découpés en différentes tailles pour répondre à divers besoins. Ils sont couramment utilisés pour l'identification par les étudiants, comme présentations lors de cours et de démonstrations, ou comme fragments pour des tests d'identification physique en laboratoire. Ces échantillons présentent également plusieurs caractéristiques géologiques classiques, telles que le clivage, et les collections peuvent être utilisées pour tester et comparer la dureté de Mohs d'autres minéraux.
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Classroom Collection of Minerals and Rocks
Classroom Collection of Rocks and Minerals Designed for General Classroom Use
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Natural Crystal Collection
Identify all six crystal systems (cubic, tetragonal, orthorhombic, monoclinic, triclinic and hexagonal) with the 15 representative specimens of natural crystals included in this collection. In compartmented box with key sheet listing the locality and crystal form of each specimen.
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Short Wave Fluorescent Minerals Set
Demonstrate the vivid contrasting colors of fifteen specimens when illuminated under shortwave ultraviolet light. Some specimens are also long wave reactive. Specimen average size: 1" x 1". Comes in compartmented box with key sheet.
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Universal Specific Gravity Kit for an Electronic Scale
The Universal Specific Gravity Kit is designed to be used with any electronic scale with a minimum capacity of 15 grams and a tare (re-zeroing) function to easily measure the specific gravity of gemstones and minerals.
Just weigh the stone "in air" on the integrated weighing platform of the scale, then without changing the setup, weigh the stone in water by placing it in the underwater weighing pan of the gem holder suspended above the platform. Plug the two values into the specific gravity equation and obtain the specific gravity of your stone.
Includes: lightweight gem holder support and underwater weighing pan, independent, spill-resistant, adjustable beaker support, beaker for filling with water - 100ml capacity, aluminum test weight, stainless steel tweezers, instructions, reproducible Specific Gravity worksheet, table of 300 common minerals/gems sorted by SG, with 6 other properties, including refractive index.
Note: shown with Boreal Balance - not included.