Look for descriptions regarding "blemishing." While small natural imperfections prove a pearl is real, the surface should be mostly smooth and free of major cracks or pits.
Since you can't do the "tooth test" (rubbing pearls against your teeth to feel for a gritty texture), look for these visual cues in high-resolution photos: how to buy pearls online
This is the most important factor. High-quality pearls have a sharp, mirror-like reflection rather than a dull or chalky appearance. Look for descriptions regarding "blemishing
Look for consistent feedback on platforms like Google or Trustpilot regarding luster and matching. 2. Know the 5 S's of Pearl Quality they are likely synthetic.
If every pearl in a strand looks 100% identical in shape and color, they are likely synthetic.