How to Purchase a Diamond

Understanding the 4 C’s


Diamonds can be found in all shapes and sizes. The size of a diamond is determined by its weight in carats. A carat is divided into 100 points.


A good cut enables a diamond to make the best use of light. A fully cut round diamond has 58 facets, which are small, flat, polished surfaces cut into a diamond.

Diamond Trading Company


A diamond is the only stone which the absence of color makes the stone more valuable. A colorless diamond acts as a prism to form a rainbow of colors, commonly called “fire”.


Most diamonds contain inclusions. Inclusions are natural birthmarks and considered nature’s fingerprints on the diamond.

Bluestone Trading Virtual Clarity Grading Booklet

Clarity Grading Booklet

Because diamonds are formed deep within the earth and under extreme conditions, they often contain unique birthmarks.

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Color Grading

Perfect for sorting, grading diamonds or other gemstones.

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Diamond Buying Guide

Diamonds are graded using 4C’s grading system to determine quality (Cut, Color, Clarity and Carat).

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Weight Calculation Guide

Use this guide to estimate the weight of a diamonds that are mounted in jewelry.

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