Jewelry Buying Guides: The 2026 Reference

Sizing — get this right before anything else

The two most common reasons jewelry sits unworn are wrong size (rings, chains) and mismatched ear style (studs vs hoops). Both are avoidable:

• Ring size: Trace an existing ring on paper, or order a free plastic sizer kit (most jewelers send them). Measure at the end of a normal day — fingers swell up to a full size between morning and evening.
• Chain length: 16" sits at the base of the neck, 18" at the collarbone (most universal), 20" mid-chest, 22"+ for layering or longer pendants.
• Earrings: Lever-back and magnetic closures fit more piercing types than standard friction posts. For older wearers, prioritize ease of clasp over style.

Category-specific sizing notes are in our rings, necklaces, earrings, and bracelets category guides.

Verifying what you're actually buying

Hallmarks and stamps

Real precious-metal jewelry carries a hallmark — usually inside a ring band or on a chain clasp. 14K, 18K, .925, 925, Pt950, Ti — these are the markings to look for. The seller's mark (a small logo or initials) sits next to it. Anything sold as "gold" or "silver" without a hallmark should be treated as plated or costume.

Stone certification

For natural diamonds over 0.5 carat, demand a GIA or AGS grading report. For lab-grown diamonds, IGI is the most common authority. For sapphires and rubies, GRS and SSEF reports are the trusted sources. Moissanite and most lab-grown colored stones don't carry equivalent grading — rely on the seller's return policy instead.

Provenance

For natural diamonds and colored stones, ask about country of origin and the Kimberley Process for diamonds. Lab-grown alternatives sidestep this entirely.

Red flags that should stop a purchase

• Listed weight or karat that's missing or vague
• "Diamond-equivalent," "CZ," or "crystal" advertised as a stone substitute without clear disclosure
• 70%+ off retail — typically inflated baseline pricing
• No return policy on stock items
• No physical address or contact for the seller
• Reviews that all post within a narrow date range or read identically
• Stones over 0.5 ct sold without a grading certificate

Continue with our guides