carat
There is no standard measure.
It measured by the density of the size from the hydrometer.
Disdrometer is used to measure hail occurrence and size if that is what you mean by measure
there is a device called a hydrometer that measures humidity. theres a unit to measure heat called a calorie. those are two to measure it!
To measure, or measuring is the use of units to find a size of quantity
A Purple Gem is called a Amethyst
In Sanskrit 'gem' is called 'ratnam(n)[ रत्नम्]'.
Idaho is called the Gem State.
It is called the opal.
The measure of the size of something in three-dimensional space is its volume.
There is nothing called a "gold" "gem". Something is either made of gold or it is a gem, but it is not both.
Carnelian gem is called "लास्या रत्न" (Lasya Ratna) in Hindi.
Most gem-quality diamonds found are about the size of a pea.
Protractor
Emerald.
a gem
Turquoise.