Movement jewels: why a larger count is not automatically better

A movement's jewel count usually refers to synthetic bearing or working jewels, not decorative diamonds. It provides structural information but cannot independently grade accuracy or quality.

What working jewels do

Appropriately shaped synthetic stones provide wear-resistant working surfaces for pivots and certain escapement parts. Correct clearance, lubrication and assembly remain essential. Adding stones does not automatically improve every aspect of a movement.

Different structures require different counts

Automatic winding, chronographs and other complications create different working positions. Even movements with similar functions can use different layouts. Understand the mechanism before comparing two isolated numbers.

Jewel bearings still need maintenance

Pivot condition, cleanliness and suitable lubrication remain important. More jewels do not eliminate contamination, degraded lubricant or shock damage. Servicing must assess the actual working parts rather than infer condition from the printed count.

Common misunderstandings

Decorative or unnecessary additions may increase a displayed number without equivalent functional benefit. Calibre information, manufacture and service transparency are more useful than treating the jewel count like a score. Keep movement jewels separate from gem-setting value.

Your practical checklist

• Distinguish bearing jewels from decorative stones.
• Compare counts within comparable structures.
• Use condition checks instead of jewel-count assumptions.