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What are the varieties of Corundum?
Corundum comes in just about every color of the rainbow. Every color but red is considered sapphire. Red corundum is the mineral that forms rubies.
Did corundum is metal or non metal?
Corundum is neither a metal nor a non-metal; it is a mineral composed primarily of aluminum oxide (Al₂O₃). It is classified as a crystalline form of alumina and is known for its hardness, ranking just below diamond on the Mohs scale. Corundum is commonly found in gemstones such as sapphires and rubies.
What is a red sapphire?
Ah, a red sapphire, isn't that just a delightful thought? It's like a beautiful ruby and sapphire combined, creating a stunning gem with a rich red color. Just imagine the vibrant hues and the way it would catch the light, truly a treasure to behold.
What is the molar weight for the mineral ruby?
Ruby is essentially just the compound aluminum oxide (Al2O3) doped with chromium (which makes it red). The Cr3+ ions occupy only a very small percentage of the Al3+ positions in the crystal lattice, so the molar mass of ruby is essentially the same as aluminum oxide: 2 (26.98) + 3 (16.00) = 101.96 grams / mole
Why are corundum sapphire and ruby considered the same mineral?
They are the same mineral. All are composed of aluminum oxide, Al2O3, with trace impurities of other metals.I have often wondered the same thing, it simply cant be true since I have been studying geology and been an avid rock and mineral collector since I was 5, I have raw corundum that bares no ruby or fancy or cashmere sapphire.I also know the composition of sapphire, and its color totally depends on the other elements and not just trace. Ruby is chromium and aluminum oxide (raw corundum) iron, titanium, chromium, copper, or magnesium can give corundum blue, yellow, purple, orange, or a greenish color.To be exact since they are all aluminum oxides, and have the same hardness, I beleive that is why they categorized them all as sapphire. It would be a nightmare to reestablish Mohs hardness scale with different names for every color and say they are all 9 on the hardness scale. But to say they are all corundum isnt exactly true either.
Why is talc softer than quartz?
Talc has a mineral structure that makes it very brittle all the way down to the molecular level - it only needs a touch to break and so it is considered a 'soft' mineral because it is so weak and breaks so easily.
How do you streak a color of mineral?
You need a streak plate. A simple white unglazed kitchen tile will work for most common minerals. The tile has a hardness level of 7. Mineral streaking just requires a swipe across the plate color will help you determine the mineral and its hardness level.
Why does steel wool get softer in water?
Steel wool does not get softer under water. That is just your perception.
Are rubies the strongest minerals?
Rubies are not the strongest minerals. Diamonds are the hardest minerals, ranking a 10 on the Mohs scale of mineral hardness, whereas rubies rank a 9. This means diamonds are more resistant to scratching and abrasion.
How would you describe a ruby?
A ruby is a precious gemstone known for its deep red color due to the presence of chromium. It is a variety of the mineral corundum, with a hardness second only to diamonds, making it ideal for jewelry. Rubies are often associated with love, passion, and energy.
What is the mineral that can scratch fluorite but not quartz?
There are many, anything that has a hardness greater than 4 and less than 7, like Plagioclase. Just listing the ones on the Mohs scale, there's apatite and orthoclase.
Is mushroom a mineral?
No a mineral is like metal, that's just a fungus.
