Mohs scale of mineral hardness

the Blue topaz). To enhance the blue in the stone, it must be treated by heating and irradiation (About the Blue topaz). Untreated Treated https://www.etsy.com/listing/194949293/rough-blue-topaz-crystals-raw-natural http://www.palagems.com/blue_topaz.htm As you can see, even though the picture on the right is cut, the color is much brighter and vibrant than the raw untreated topaz. The Mohs' Hardness scale is the 1 - 10 scale of minerals hardness. The blue topaz is number 8 on that list. It's chemical composition is Al2 SiO4 (R,OH)2, which is fluor containing aluminum silicate (Schumann). Another quality of the blue topaz is that it has perfect cleavage (Schumann). Because of its perfect cleavage, the topaz is susceptible to breaking (King). When scratched, a mineral may leave a streak of a color behind. The blue topaz has a colorless streak (Schumann). The mineral has a vitreous luster (Schumann). Topaz can be cut in a variety of shapes. Topaz can be cut into a square, round, octagon, pear, oval, heart, and many others (About the Blue topaz) Pear cut Oval cut Heart cut gemsforsale.org http://www.valentinejewellery.in http://www.bidorbuy.co.za The average…

Based on Physical and Chemical Properties, Determination of Identities of Zinc, Sodium, Beryllium, Copper and Boron By: Shreya Uppala, Lizzy Jolly, and Kyrie Harrell Results: The first element we tested was zinc. Since zinc was already known, the density was stated to be 7.13g/mL and the hardness was a 2.5 based on the Mohs Hardness Scale. No magnetic attraction was observed when in contact with a magnet. Zinc had a shiny appearance with a light gray color and the strips of zinc added to…

Chalcopyrite is a copper iron sulfide mineral. Its coloring is metallic brassy to a brown-orange, and on the Mohs scale, it has a hardness of 3.5 to 4. The chemical formula of chalcopyrite is CuFeS2. It is the most commonly occurring copper containing mineral in New Zealand, but it is only created near volcanic areas. On the metaphysical level, chalcopyrite is used for meditation, specifically for opening the third eye chakra (crown chakra), and physical healing. The stone clears any energy…

According to Encyclopedia Britannica in Britannica School the word tungsten comes from the mineral scheelite which was once called tungsten, which means heavy stone. The name comes from the Swedish chemist and his countrymen who discovered the metal in scheelite. The atomic number of tungsten is 74 and tungsten’s atomic weight is 183.84. Tungsten is also one of the densest and hardest metals in the world. From Encyclopedia Britannica in Britannica School, tungsten was discovered by a Swedish…

The melting point of boron is 2348 K and its boiling point is 4273 K. The density of boron is 2.37 grams per cubic centimeter. The most common ionic charge of boron is +3. At room temperature, boron is a solid. The color of boron is kind of black-brown. Boron is an extremely hard, jet-black to silver-gray, brittle, lustrous, metal-like element. Boron’s degree of hardness is 9.5-10 using the Mohs scale. The scale cannot be used directly to qualitatively define the actual hardness. I have found…

Merriam-Webster defines calcite as “a mineral CaCO3 consisting of calcium carbonate crystallized in hexagonal form and including common limestone, chalk, and marble.” Questions arise about calcite, where does it come from? Who originally discovered it? What are its physical properties? What are some of its uses? We will find that some of the ways calcite is used are rather unique. The questions that first arises are where does calcite come from? As well as, who discovered it? Calcite was first…

The Mohs' Hardness scale is the 1 - 10 scale of minerals hardness. The blue topaz is number 8 on that list. It's chemical composition is Al2 SiO4 (R,OH)2, which is fluor containing aluminum silicate, which is fluorosilicate (Schumann). Another quality of the blue topaz is that it has perfect cleavage (Schumann). Because of its perfect cleavage, the topaz is susceptible to breaking (King). When scratched, a mineral may leave a streak of a color behind. The blue topaz has a colorless streak…

Microsoft have always disputed as to which is better. There are many similarities and differences between Apple and Microsoft. Almost everyone disagrees on the two because they are on opposite sides of the spectrum. This will examine the durability, price, and ease of use their newest phone, tablet, and smart watch. It will also help to tell which is better. The two newest smart watches from each company are the Apple Watch and the Microsoft Band. The Apple Watch is water proof, but it…

A study of moissanite jewellery industry and its global market Moissanite is used as an alternative to diamond jewellery. It is regarded at par with diamond when compared on the basis of quality and physical properties. Moreover, moissanite glitter more than diamond due to a higher refractive index and is as hard as diamond. A layman may barely distinguish between the two and mostly a distinction can be drawn through a laboratory test. However, the moissanite jewellery is cheaper in comparison…