You are probably referencing industrial diamonds, of which are are many, many different types, sizes and descriptions. You can read about the basic categories, below.
Two
About 20% of all diamonds mined are gem-quality diamonds.
Yes, diamonds can cut glass, because diamonds are harder than glass.
Assuming that your carats refer to diamonds, a diamond is valued by its cut, clarity, carat weight and colour. A local jeweler can look at your diamonds and give you a precise answer.
16 types of diamonds
You may be thinking of gem-quality and industrial diamonds. About 80% of all diamonds mined are industrial diamonds.
Carbonado diamonds are simply more porous than other types of diamonds. They are found in geology different from other types of diamonds: there is no kimberlite or other 'diamond-indicator' mineral present. There are several theories about how carbonado diamonds are formed, which you can read, below.
77 Diamonds is a retail store of diamonds. You could find 77 Diamonds in America for many types of jewelry items made of diamonds like rings and necklaces.
You are probably referencing industrial diamonds, of which are are many, many different types, sizes and descriptions. You can read about the basic categories, below.
Diamonds
Lab-created diamonds have the same physical, chemical, and optical properties as mined diamonds. Both types are durable and can be used in jewelry. The main difference is the origin: lab-created diamonds are made in controlled environments, while mined diamonds are formed naturally deep within the Earth.
There are 2 types of gemstones that you may be looking at. Either a (green) emerald precious gemstone or an emerald shape diamond. Diamonds come in all kinds of shapes, including emeralds.
2 of hearts, 2 of diamonds, 3 of diamonds, and 4 of hearts
Argyle pink diamonds are the most rare and valuable and can only be found in Argyle minds.
The duration of Diamonds - film - is 2 hours.
Diamonds are used in different types of speakers and windows. They are also used to engrave things and as an abrasive agent on industrial tools.