How to Read Moissanite Measurements and Proportions

Moissanite is best compared using millimeter dimensions, not carat equivalent alone. Measurements describe the actual face-up size and depth of the stone.

Length and Width

For elongated shapes, the first two numbers usually show length and width. These determine visible coverage and length-to-width ratio.

Depth

The third measurement is depth. Excessive depth can hide weight below the setting, while very shallow stones may lose brightness or create setting challenges.

Length-to-Width Ratio

Divide length by width to estimate the outline ratio. A higher number produces a more elongated appearance; a lower number looks broader.

Carat Equivalent

Carat equivalent is an appearance-based comparison, not the stone’s physical weight. Different shapes with the same carat equivalent can have different dimensions.

Setting Compatibility

Exact dimensions are necessary for secure prong placement, bezel design, basket fit, and wedding-band clearance.

Frequently Asked Questions

Why do two 3-carat-equivalent stones look different in size?
They may have different shapes, dimensions, ratios, or depths.

Which measurement matters most?
Length and width determine face-up coverage, while depth affects cut performance and setting construction.