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Roughly, specific gravity compares the volume of an item and its weight to an equal volume and weight of water. Archimedes first used it as a way to determine if a king's crown was made of pure gold. If the crown was put in a bucket and the water level rose to the same level as an equal level as it did with an equal weight of pure gold, then the crown was made of pure gold. If it did not, then the king's crown was made of something else.
Hardness is totally different. A hardness scale was developed based on what materials would scratch other materials. On that scale, an emerald is 8, a ruby is 9, and a diamond is 10. A ruby and a diamond will scratch an emerald. But only a diamond will scratch a ruby. The original scale had a total of 10 items. Scientists started with it but have modified it. They have gone over to a pressure based scale. South African diamonds are twice as hard as Australian diamonds. Australian diamonds are still extremely hard. Scientists have created a compound that does not exist in nature with a hardness of 11. They have also gone over to a more scientific scale which uses units of force for hardness.
What else can I help you with?
What is the Mohs hardness of Otavite?
Its Mohs hardness is 3.5 to 4 and the specific gravity is 5.04
What is the specific gravity of an emerald?
The hardness of an emerald on the Moh's Scale is 7.5-8
What 2 properties of minerals can be expressed in numbers?
Two properties of minerals that can be expressed in numbers are hardness and specific gravity. Hardness is usually determined using the Mohs scale and is expressed as a number between 1 (softest) and 10 (hardest). Specific gravity is the ratio of a mineral's density compared to the density of water and is expressed as a number.
What is the specific gravity of garnet?
Specific gravity of corundum is between 3.95-4.01.
What has the author Michael Carl Wiemann written?
Michael Carl Wiemann has written: 'Estimating Janka hardness from specific gravity for tropical and temperate species' -- subject(s): Hardness, Specific gravity, Testing, Wood
What is the hardness of hematite?
Hematite is a 6.5 on the Mohs scale of mineral hardness.
Is Hardness or Specific gravity compares the weight of a mineral with the weight of an equal amount of water?
Hardness compares the weight of a mineral with the weight of an equal amount of water
What is topaz's specific gravity?
the specific gravity of a topaz is 3.4 to 3.6
What mineral has a hardness of 7 is red no streak color and a specific gravity of 2.65?
It is definitely a form of the mineral quartz, maybe jasper or carnelian.
What is the specific gravity of amethyst?
Amethyst is 7.0 on the Mohs hardness scale; it is fairly hard. Amethyst is a member of the quartz family. Most citrine on the market is reported to be heat-treated amethyst.
What is difference between gravity and gravitational force?
Gravity is the natural force of attraction that pulls objects toward each other, whereas gravitational force is the specific force of attraction between two objects with mass. Gravity is a general concept that describes the phenomenon, while gravitational force refers to the specific interactions between objects due to their mass.
What are six properties of minerals used to tell them apart from another?
Hardness, specific gravity, cleavage, chemistry, crystallography, color.
