Pennyweight.

Pearl: look-alikes and how to tell

Short answer

Pearl is commonly confused with glass beads with pearl essence, plastic, shell pearl ("Majorica").

Natural or cultured (X-ray only), and nacre thickness.

Look-alikes

What to look at

At the drill hole: flaking coating or a glass rim means imitation. Identical shapes and sizes and a perfect surface too. Real pearls differ from one another.

What settles it

All look-alikes · Stamps

Frequently asked

What can pearl be mistaken for?

glass beads with pearl essence; plastic; shell pearl ("Majorica").

How can I tell pearl from its look-alikes?

Rubbed very gently against a tooth, a pearl feels gritty and an imitation glides. It is only a hint (some imitations feel gritty too) and do not insist: rubbing can mark the nacre. 10× loupe at the drill hole. Natural or cultured: laboratory X-ray.