What is a blister pearl?
By Jared James · Last updated 21 May 2026
Definition
A blister pearl is a pearl that has grown attached to the inner wall of a mollusc shell rather than forming freely inside the tissue, so when it is cut away it has a flat, shell-backed base and a domed nacre-coated top. Because it is hollow and fused to the shell, a blister pearl cannot be drilled through for stringing in the normal way, and it is typically set in a closed-back mounting that conceals the flat side. Mabe pearls are a cultivated form of blister pearl, grown by inserting a dome-shaped nucleus against the shell.
Frequently asked questions
- What is the difference between a blister pearl and a mabe pearl?
- A blister pearl forms naturally against the shell without human intervention, while a mabe pearl is a cultivated blister pearl grown by implanting a dome-shaped nucleus. Mabe pearls are more consistent in shape and more commonly seen in jewellery.
- How are blister pearls used in jewellery?
- Because they have a flat back and are hollow, blister pearls are set in closed metal settings, often bezels, that cover the base. They are popular in rings, earrings and pendants where the domed, lustrous face is the feature.
- Are blister pearls valuable?
- Natural blister pearls vary widely in quality and lustre, and they command more modest prices than fine round pearls. Mabe blister pearls with good lustre and a regular dome shape are more consistently priced and widely available.
Designing a ring
Talk through blister pearl with us
Tell us what you have in mind, even if it is only a budget and a piece of jewellery type, and we will help you weigh up the options. We reply to every enquiry, usually within one business day.
Contact the studio