A gemstone description should help another person select or evaluate the same type of stone you have in mind. “Small green oval” may communicate the general look, but it is not enough when a stone must fit a setting or match other stones in a pair or collection.

Identify the material first

Name the gemstone and variety where relevant. Clarify whether it is natural, laboratory-grown or a simulant. If treatment status or geographic origin matters, state the information required and whether a report is needed. Do not infer these facts from appearance.

Record dimensions in millimeters

For setting work, record length, width and depth where appropriate. Millimeter dimensions are essential because carat weight alone does not determine face-up size. Two stones of the same carat weight can have different proportions.

For matched earrings or a row of stones, specify the acceptable dimension range and whether the pair or group must be closely matched.

Name the shape and cutting style

Use recognizable outline terms such as round, oval, pear, marquise, emerald, cushion or cabochon. If the facet style matters, describe it separately. Shape and cut quality are related but distinct: shape describes the outline, while cut quality concerns proportion, facet placement, symmetry and polish.

Define color in a useful way

A color description may include hue, tone and saturation, but words alone can remain subjective. Use a reference image, physical sample or a documented range where possible. State the lighting conditions if color matching is critical.

For a group of stones, decide whether they should match closely or whether a coordinated range is acceptable. Natural gemstones may show variation, and the acceptable level should be agreed rather than assumed.

Include treatment and origin information

Record known treatments, such as heating, dyeing, filling or coating where relevant. If the stone must be untreated, specify the evidence required. Geographic origin should be included only when it is supported by suitable documentation.

The FTC consumer advice on gemstones and treatments explains why buyers should ask about treatment and care implications.

A simple gemstone specification

Gemstone / variety: Natural, laboratory-grown or simulant: Shape / cutting style: Dimensions (L × W × D): Carat weight, if available: Color reference / acceptable range: Matching requirement: Treatment status: Origin claim, if required and supported: Report or documentation: Setting and orientation notes:

Frequently asked questions

Should gemstone size be stated in carats or millimeters? Both can be useful. Carat is weight; millimeters describe dimensions needed for fit and visual proportion.

How should two earrings stones be matched? Specify dimensions, shape, color range, orientation and the acceptable level of visible variation.

Can a supplier guarantee exact color matching? Ask what matching standard and tolerance are possible for the particular material and availability. Avoid assuming every natural stone can be identical.

Specify stones before designing the setting

The stone dimensions and shape influence the setting geometry. Share your gemstone requirements with VELORA MUSE before finalizing the design.