Casio Oceanus Manta: Sapphire Crystal Arrives on the Bezel

Casio Oceanus Manta Brings Sapphire Crystal to the Bezel for the First Time

Casio has expanded its premium Oceanus Manta collection with models featuring sapphire crystal bezels — a first for the brand. The new releases, announced in July 2023, demonstrate how sapphire crystal technology is moving beyond watch dials and into new applications across the timepiece.

Sapphire Crystal Bezels: A New Frontier

While sapphire crystal has been standard for watch faces for decades, applying it to bezels represents a significant manufacturing challenge. The bezel requires not only flat crystal surfaces but also curved edges, precise tolerances, and integration with the case's water-resistance system.

Casio's achievement in bringing sapphire crystal bezels to the Oceanus Manta line signals that this technology is becoming more accessible and could eventually trickle down to more affordable watch segments.

Technical Specifications

Sapphire Crystal Applications in Modern Watchmaking

The use of sapphire crystal in watches has expanded dramatically in recent years. Beyond traditional crystal applications, manufacturers are now exploring sapphire for:

• Full cases: Hublot, Richard Mille, and Jacob & Co. create watches with entire sapphire cases
• Bezels: Casio's Oceanus Manta introduces sapphire bezels
• Dials: Brands like Zeitwinkel and Charlie Paris use sapphire dial plates
• Casebacks: Standard on most luxury watches for movement visibility

The Cost Factor

Sapphire crystal remains significantly more expensive than mineral glass or hesalite. The manufacturing process — typically involving the Verneuil method or Czochralski process — requires high temperatures (over 2,000°C) and precise chemical control. Each crystal must be cut, ground, and polished from raw boules, adding substantial cost to the final timepiece.

However, as manufacturing techniques improve and production volumes increase, prices are gradually decreasing. Casio's move to sapphire bezels in a mid-range luxury collection suggests the technology is becoming commercially viable at lower price points.

Frequently Asked Questions

What is a sapphire crystal bezel?

A sapphire crystal bezel replaces the traditional aluminum, ceramic, or steel bezel insert with a sapphire crystal component. This provides superior scratch resistance and a distinctive transparent aesthetic.

Are sapphire crystal bezels more durable?

In terms of scratch resistance, yes — sapphire scores 9 on the Mohs scale. However, sapphire is more brittle than steel or ceramic, so it may be more susceptible to shattering on hard impacts.

Will sapphire bezels become common in affordable watches?

As manufacturing costs decrease and production techniques improve, sapphire crystal components are likely to appear in increasingly affordable watch segments. Casio's implementation in the Oceanus line suggests this trend is already underway.

Related Reading

• Complete Guide to Watch Crystal Types
• Sapphire vs Mineral Crystal: What You Need to Know

Sources: aBlogtoWatch, Monochrome Watches, Fratello Watches