9 on the Mohs Scale of Mineral Hardness
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Sapphire is a very strong and durable gemstone, second only to diamond on the Mohs scale of hardness. This makes it suitable for everyday wear, such as in engagement rings. Its durability and scratch-resistance make it a popular choice for jewelry.
Sapphire Energy was founded in 2007.
A one carat sapphire typically weighs around 0.2 grams. Keep in mind that the weight can vary slightly depending on the specific density of the sapphire.
Diamond is one of the hardest materials and is difficult to scratch due to its strong covalent bonding structure. Other materials such as tungsten carbide, sapphire, and ceramic are also known for their high scratch resistance.
Sapphire is not an insulator, as it is a type of corundum crystal that exhibits good electrical conductivity due to the presence of impurities. Sapphires are commonly used as semiconductors in electronic devices and have applications in optoelectronics due to their transparency and durability.
The adverb form of "strong" is "strongly." For example, "He strongly disagreed with the decision."