LuxuryWatchesCasio G-Shock celebrates 40th birthday with new gem and mineral-inspired collectionTwo-stage ion plating gives these watches a unique, gem-like case and bezelWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

LuxuryWatchesCasio G-Shock celebrates 40th birthday with new gem and mineral-inspired collectionTwo-stage ion plating gives these watches a unique, gem-like case and bezelWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

Two-stage ion plating gives these watches a unique, gem-like case and bezel

When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

(Image credit: Casio)

Casio G-Shock Sunstone

(Image credit: Casio)

The company adds: “As part of the metal-covered bezel’s finishing process, these models employ forging with special dyes, creating a mineral-inspired rough-moulded accent across the entire bezel face. The uneven portions are then given a glossy honing, and each part polishing – from the top to the sides – to a hairline or mirror finish.”

To create this look, Casio employs a two-step ion plating (IP) process where certain areas are masked after the first plating, then plated again in an additional colour.

(Image credit: Casio)

Casio G-Shock Cordierite

(Image credit: Casio)

Three versions will be coming to the UK when the collection launches in January 2023. These are called the GM-5640GEM x Sunstone, the GM-2140GEM x Cordierite and the GM-114GEM x Calcite, and they are to be priced at £280, £270 and £290 respectively.

The sunstone model has a multi-colour shine that changes hue depending on the viewing angle, Casio says, and the rainbow coloured bezel is paired with a grey band. Features of this model watch include the G-Shock’s trademark shock-resistant structure, water resistance to 20 bars of pressure (equivalent to 200 metres), a 1/100-second stopwatch, countdown timer, multi-function alarm, backlight and flash alert.

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Next up is the £270 Cordierite edition, pictured above, which has a blue face with a mixed-colour moulded resin band. Casio says how the “polarised vapour deposition: f the face gives off a different shine depending on the viewing angle. Features are similar to the Sunstone edition, plus a world timer for 48 cities, five daily alarms and a double LED light.

(Image credit: Casio)

Casio G-Shock Calcite

(Image credit: Casio)

Lastly, for the UK market at least, is the Calcite edition. Pictured above, this features a metal bezel forged and ion plated with gold and black to represent calcite’s base ore. Casio says how hot-stamping gives the band its uneven texture, and the watch features ISO 764-compliant resistance to magnetism, and an auto LED light, plus the water resistance and stopwatch/timer functions of its Gem Collection siblings.

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