October 1, 2026
Casio-Introduces-New-MRG-B5000-and-GMW-B5000-Sapphire-G-Shocks-with-Ti64.png

ⓘ Casio – modified

The two new Casio watches from the MRG and GMW series presented together with the MRG-D5000

Casio has launched two more G-Shocks in blue sapphire. The 500-piece MRG-B5000SA-2JR comes with two two-carat stones for ¥880,000, while the GMW-B5000SB-1A2JF sets four smaller ones in the bezel for ¥110,000. All stones are lab grown, not mined.

Two more blue sapphire G-Shocks were listed on Casio Japan this morning – with this new collection, they cover a huge amount of money. The MRG-B5000SA-2JR costs ¥880,000, about $5,590. The GMW-B5000SB-1A2JF costs ¥110,000, about $700. Both carry lab-grown blue sapphires and both came with the same announcement as the ¥11,000,000 MRG-D5000. We’ve already covered both of these watches in leaks.

Take the MR-G first. It’s called Super Blue, named after the ice cave in Iceland’s largest glacier, and is limited to 500 serial-numbered pieces for December. The bezel features two two-carat sapphires, faceted to catch light from any angle, and Casio has been deliberately lab-grown, claiming that natural stones rarely achieve the desired blue. Blue is also present everywhere: AIP on the bezel, IP on the suspension parts, and a blue deposition on the sapphire crystal itself.

Below is the MRG-B5000, so the top bezel is Cobarion and the case and pushers are Ti64 titanium. It measures 49.4 × 43.2 × 12.9mm and weighs 103g, and the multi-guard structure has been specially redesigned to protect the stones. The caseback features the MR-G 30th logo and serial number.

GMW makes something smaller for a fraction of the money. Four round brilliant-cut sapphires sit in the bezel dimples, each supported from behind by a steel pedestal and rubber pad, with a hole drilled so that light reaches the stone. Casio pairs these with a black IP bezel, negative display, and a black urethane strap, so blue is the only color on the watch. The case is stainless steel, 49.3×43.2×13 mm, 98 g, coming in November.

Furthermore, there is another key difference: the MR-G has sapphire crystal; GMW obtains inorganic glass.

Buy Casio GMW-B5000-D1 on Amazon.

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Rosa

Hello! I am a Ashley and i am passionate writer and editor. I love sharing my thoughts on technology, lifestyle, and global news.

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