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Pure Pearls Glossary

Know exactly what you are buying

300 pearl and jewellery terms, each one linked to a piece you can hold.

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Quality & Grading

1–22 of 22

AA Grade

Good lustre with visible but minor surface marking. The everyday-wear grade, and where most sensible value sits.

AAA Grade in pearl jewellery from Pure Pearls

AAA Grade

The top of the standard pearl scale: sharp lustre, near-clean surface, well matched, and shape true to its type.

186 in stock · from ₹9,500

Basra Pearl

Natural pearls historically fished from the Persian Gulf. The name is now used far more often than the pearls exist.

Bleaching

A standard post-harvest treatment that evens out a pearl's colour and lightens it. Near universal in Akoya.

Body Colour in pearl jewellery from Pure Pearls

Body Colour

A pearl's dominant underlying colour, before any overtone is considered.

Certificate of Authenticity

A document stating what a pearl is. Useful in proportion to who issued it and what it actually tests.

Circled Pearl

A pearl with grooves or rings running around it. Traditionally a defect, now often sold as a feature.

Hanadama

A Japanese certification for the top tier of Akoya pearls, issued by an independent laboratory rather than a seller.

Lustre

How sharply a pearl reflects light. The single most important quality factor, and the one you can judge without any training.

Maeshori

The Japanese pre-treatment given to pearls after harvest to bring up lustre before they are sold.

Matching

How consistently the pearls within one piece agree on size, colour, lustre and shape. A grading factor in its own right.

Multi Shaded

A piece deliberately strung from pearls of different colours, arranged as a gradient or a scatter.

Nacre

The material a pearl is made of: microscopic aragonite platelets glued in layers by conchiolin. Thickness determines both lustre and lifespan.

Orient

The faint shifting rainbow that plays across the surface of a fine pearl, distinct from its lustre or its colour.

Overtone

A translucent secondary colour lying over a pearl's main body colour, most often rose, silver or green.

Peacock in pearl jewellery from Pure Pearls

Peacock

A dark pearl showing green, blue and rose flashes over a near-black body. The most prized colour effect in dark pearls.

36 in stock · from ₹400

Pearl Grading in pearl jewellery from Pure Pearls

Pearl Grading

The A to AAA scale used to rate a pearl on lustre, surface, shape, colour matching and nacre. There is no global standards body enforcing it.

91 in stock · from ₹18,000

Provenance

Where a pearl or stone came from. It can multiply the price, and it is the hardest claim to verify.

Surface Blemish

Pits, bumps, creases and dull patches on a pearl's surface. Some marking is present on essentially every pearl.

Symmetry

How evenly a pearl or stone is balanced around its own axis. What separates a fine drop from a baroque one.

Twin Pearl

Two pearls fused together during growth, sharing a nacre skin.

X-Ray Testing

The only reliable way to tell a natural pearl from a cultured one, by imaging what is inside it.

When you are ready

Every word here leads back to a pearl