Are My Pearls Real? A Checklist
A few checks at home can point to an imitation pearl. Answer what you can below: the notes narrow to what GIA found for each answer, and a count shows which way your answers point. None of these checks proves a pearl real, and none can tell a natural pearl from a cultured one; a laboratory can.1 2
Check your pearls#
The notes below come from GIA’s studies of imitation pearls and from CIBJO’s standards.
Answer any of the questions to see the notes that apply.
The surface
- Overlapping platelets are what nacre looks like: it is built of microscopic platelets of aragonite, which imitations lack. 3 4
- GIA describes imitation pearls as often showing a glittery surface from their coating material, and sometimes molded drill holes. In one group of shell-bead imitations, magnification showed many tiny glittering particles instead of nacre platelets. 4 5
- In GIA's study of Majorica imitations, strong iridescence on a smooth surface, with a very high luster, pointed to an imitation; on cultured pearls that kind of iridescence was more common on irregular surfaces. 1
The drill hole
- Under 10× magnification, a cultured pearl shows a thin, often dark layer of conchiolin between the shell bead and the nacre, and the edges of the hole are sharp and well defined. 1
- The imitations GIA examined had no such layer, and ragged edges. Coatings can chip and peel near the hole, sometimes exposing the white shell underneath. 1 4
- An unusually large drill hole can be a warning sign. 5
The tooth test
- In GIA's study, the tooth test was one of four conclusive tests: the cultured pearls felt gritty against the teeth and the imitations felt smooth. 1
What these checks can and can’t show
- Weight isn’t a reliable guide: GIA found coated shell-bead imitations similar in heft to cultured pearls. 4
- Avoid any test that could damage a pearl. A dilute acid makes a cultured pearl effervesce, and CIBJO says pearls should be kept away from all acids. 1 3
- Natural pearls share most surface characteristics with cultured pearls, so these checks can't tell them apart. X-ray imaging can: a natural pearl shows no bead or curved cavity at its center. 1 2
- Imitations can still surprise a lab. In 2025, GIA’s Mumbai laboratory found one imitation among about 9,360 pearls in 18 strands. 5
- A laboratory report states whether a pearl is natural or cultured, and SSEF’s reports also indicate treatments. 6
What you need#
A 10× loupe is enough for the surface and the drill hole; GIA examined drill holes at ten-power magnification.1 The page how to tell if pearls are real explains each check in more detail, and real vs imitation pearls covers what imitations are made of.
References#
- June Hanano, Mary Wildman and Philip G. Yurkiewicz (1990). Majorica Imitation Pearls. Source · DOI 10.5741/GEMS.26.3.178 · Archived copy (accessed 2026-10-25)
- Changbo Zhu, Paul C. Southgate and Ting Li (2019). Production of Pearls. Source · DOI 10.1007/978-3-319-96776-9_5 · Archived copy (accessed 2026-10-25)
- CIBJO, The World Jewellery Confederation, Pearl Commission (2026). The CIBJO Pearl Book (Pearl Blue Book) 2026. Source · Archived copy (accessed 2026-10-25)
- Jessie Yixin Zhou and Chunhui Zhou (2014). Shell Pearl as a Pearl Imitation. Source · Archived copy (accessed 2026-10-26)
- Karan Rajguru, Anukul Belanke and Abeer Al-Alawi (2025). Imitation Seed Pearl with Blue X-Ray Fluorescence. Source · Archived copy (accessed 2026-10-26)
- Swiss Gemmological Institute SSEF. Pearls (SSEF reports). Source · Archived copy (accessed 2026-10-25)
- Written by
- Learn About Pearls editors
- Fact-checked
- Learn About Pearls editors,
- Reviewed by
- Simon,
- First published
- Publisher
- Unique Pearl, a pearl jeweler
Revision history
- : First published. First published
How to cite this page
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@misc{lap-tools-are-my-pearls-real, title = {Are My Pearls Real? A Checklist}, author = {{Learn About Pearls editors}}, year = {2026}, howpublished = {\url{https://learnaboutpearls.com/tools/are-my-pearls-real/}}, note = {Learn About Pearls, published by Unique Pearl}}
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