Dimatec Inc. - Diamond Grades (1 of 3)

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All surface-set diamond bits manufactured by Dimatec are available with one of eight standard grades of natural drill diamond set on the cutting surfaces of the bit face. The diamond grades are described as follows:

AAA Grade

AAA Grade Diamond

Premium quality natural drill diamond. These stones are round to octahedral and dodecahedral in shape and may have small amounts of internal inclusions with no cracks or fissures.

AA Grade

AA Grade Diamond

High quality natural drill diamond. These stones are mainly round with a small percentage of off-shaped stones and somewhat spotted as well as crystal shaped stones.

A Grade

A Grade Diamond

Medium quality natural drill diamond. These stones have a generally blocky shape with somewhat broken surfaces and sharp edges. Many have fissures, inclusions and minor surface cracks.

E Grade

E Grade Diamond

Economy quality natural drill diamond. These stones are commonly referred to as “casting” grade. They have an irregular blocky shape with broken surfaces and sharp edges. Many are spotted and may contain semi-flat and naturally cleaved stones.

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	AAA Grade

	AA Grade

	A Grade

	E Grade

	P1 Grade

	P2 Grade

	P3 Grade

	Carbonados

	Physical Properties of Natural Diamond

	Application of Natural Diamond Grades

	Kicker Grade



	Surface Set Diamond Core Bits

	Diamond Size Ranges

	Bit Crown Profiles

	Waterway Configurations

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