Jewelry Making Charms: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

They disagree: Claude chooses Nunn Design and GPT chooses TierraCast

In Arts, Crafts & Sewing, Claude and GPT choose the same brand in 46 of 83 categories.

Claude Opus 5.5 · October 27, 2026

Nunn Design (brand)

Nunn Design makes lead-free cast charms and bezels with consistent plating and crisp detail, unlike most unbranded bulk charm lots.

Not for: Buyers who want solid sterling or gold charms for fine jewelry, or the cheapest bulk mix for kids' projects.

GPT 6.1 Sol · November 10, 2026

TierraCast Tree of Life Charm

Its detailed, versatile design works well as a focal charm on handmade bracelets or necklaces.

Not for: Those seeking solid precious metals rather than pewter.

Base metal. For skin contact choose sterling (.925), gold-filled or 304/316 stainless steel, or charms stated as lead-free and nickel-free. Cheap zinc alloys can contain lead or nickel, causing reactions and safety issues, especially for children.
Plating quality. Treat plated charms as fashion-grade. Expect wear on high-contact pieces unless the base metal is solid. Thin plating on alloy rubs off and exposes a darker metal underneath.
Loop and connection. Check the loop or hole size against your jump ring gauge and chain. Soldered or cast loops are stronger than glued bails. Undersized loops will not take sturdy jump rings, and glued bails detach.
Casting finish. Look for clean edges with no flash or pitting. Rough castings snag clothing and look cheap once worn.

Shops seen in search results on November 5, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Large unbranded charm mixes with no metal disclosure, for jewelry worn by children.
Charms sold as 'silver' without a .925 or stainless designation.