How do you work out the percentage of a diamond table?

Similar to the diamond depth percentage, a diamond’s table percentage is calculated by dividing the diameter of the table by the average diameter of the girdle. For fancy shaped diamonds, table percentage is computed by dividing the table width by the width of the widest part of the stone.

How do you calculate diamond ratio?

The diamond depth ratio is calculated by dividing the height by the diamond’s width. In this context, the height is the jewel’s length from the top to the culet at its base. If a diamond’s height is 2mm and the width is 4mm, its depth is 50%.

How big should the table be on a diamond?

Generally, the best-looking diamonds have table sizes in the range of 55% to 60% (measured as a percentage of the diameter of the diamond). The size of the table is more important in larger diamonds, say over 1/2 ct. Variations in table sizes are less critical than crown and pavilion angles.

What should the depth and table be on a diamond?

Round Diamond – Cut Guide

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EXCELLENT GOOD
Table % 53 – 58 51 or 61 – 64
Depth % 59 – 62.3 57.5 – 57.9 or 63.6 – 64.1
Crown Angle 34 – 34.9 30.1 – 32 or 36 – 37.9
Pavilion Depth 42.8 – 43.2 41 – 41.9 or 44 – 45.5

How do you calculate L to W ratio of a diamond?

To calculate the L/W ratio just divide the length of the diamond by its width. For e.g. a pear shaped diamond with a length of 7.5 mm and a width of 5.0 mm will have 1.50: 1 length-to-width ratio. The diamond shape is though a matter of personal taste, but there are certain set standards to describe the best L/W ratio.

What is diamond L W ratio?

L-W RATIO. Length-to-Width Ratio –The length-to-width ratio compares the length of a diamond to its width to show how elongated a fancy-shaped diamond appears when viewed from the top.

Is faint fluorescence OK in a diamond?

Diamond Fluorescence and Near Colorless Diamonds

For nearly colorless diamonds in the G-H range, we recommend faint fluorescence at most. Faint fluorescence can have the benefit of bumping your diamond up one color grade, making your “near-colorless” diamond appear “colorless.”

Which level is best for diamonds?

What is the Best Level/Height to Find Diamond? Diamond used to appear between Y=0 and Y=15 with most generated between levels one and five. While the ore still starts generating at 15, it now becomes more and more common as you dig deeper into the earth. Diamond has the highest odds of spawning at Y=-64.

How important is girdle in diamond?

The girdle hold the diamond securely in place in jewelry. Because heat and pressure are applied in the setting process, an extremely thin girdle can chip the diamond. On the other side, an extremely thick girdle may mean too much carat weight is trapped in the center of the diamond and so the depth is too much.

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Can a diamond be too deep?

A diamond’s total depth or height is measured from the surface of the table to the culet, in other words, from top to bottom. … When a diamond’s total depth is too high relative to the average girdle diameter, it is said that the diamond is too deep.

How do you find the ratio of length and width?

What is a ‘Length-to-width’ ratio? Most simply, the length-to-width ratio of a particular diamond is calculated by taking the two first dimensions found on any GIA certificate, the length and the width, and dividing the two numbers. The yield you get from that calculation is the diamond’s length-to-width ratio.

What is the best LW ratio for round diamond?

Round Cut Diamond Guide

Every diamond shape has a length-to-width ratio that determines how a diamond will appear when viewed from above. When selecting a loose round diamond, look for a length-to-width ratio between 1.0 and 1.05.

How many MM is a .75 carat diamond?

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MM Size Carat Weight
4.5 mm. 0.50 ct.
4.75 mm. 0.64 ct.
5 mm. 0.75 ct.
5.25 mm. 0.90 ct.