An $80,000 G-SHOCK sounds like the interesting part until you look at how Casio actually built it.
The new MRG-D5000 surrounds the familiar digital G-SHOCK shape with blue sapphire crystal, a material prized for its scratch resistance but far less forgiving when it comes to concentrated impacts. Casio says screw holes and other fine structural details can create areas where sapphire is more vulnerable to cracking, which meant simply recreating an existing MR-G case in crystal was never going to work.
Instead, Casio had to redesign the structure around the material.
Sapphire Was A Problem Casio Had Been Trying To Solve For Years
The idea goes back much further than this watch. Casio revealed a sapphire G-SHOCK concept in 2018, but the prototype could not satisfy the shock-resistance standards required for a production model.
Development continued through what eventually became the Blue Rose Project.
For the MRG-D5000, Casio developed a new version of its Multi-Guard Structure that separates the bezel and outer case into multiple sapphire components. Those parts interact with one another to help disperse the force of an impact without drilling vulnerable screw holes through the crystal.
Casio says the approach takes inspiration from traditional Japanese kigumi timber construction, where carefully shaped components interlock without relying on screws or nails.
It is an interesting connection because Casio has already referenced kigumi elsewhere in the MR-G family. The MRGB2100B-1A uses a dial inspired by the same woodworking tradition, although there the influence is primarily visual. On the MRG-D5000, Casio is applying the principle to the physical construction surrounding the module.
The sapphire itself also gets a surprisingly selective start. Casio says the blue crystal begins as ingots grown over several months, after which only sections that meet its requirements for colour concentration and transparency are chosen for the watch.
It Takes The Multi-Guard Idea Much Further
Casio has already used a highly segmented case structure on models such as the MRG-B5000R-1, where the bezel is assembled from numerous individual components rather than one conventional shell.
The MRG-D5000 applies that philosophy to sapphire, but doing so has made the watch noticeably thicker.
It measures 51.1 x 43.2 x 16.5 mm and weighs 121 grams. For comparison, the MRG-B5000R-1 measures 49.4 x 43.2 x 12.9 mm and weighs 103 grams.
That means the new sapphire model is around 3.6 mm thicker and 18 grams heavier.
It is also worth clearing up one detail. The MRG-D5000 is not an entirely sapphire watch.
Casio lists the case and bezel materials as a combination of titanium and sapphire crystal. Around the back is a screw-lock caseback made from Grade 5 titanium with another piece of blue sapphire set into it. Each watch is individually numbered from 1/20 to 20/20.
The caseback also carries a DREAM PROJECT inscription. Casio says the “D” in MRG-D5000 references the earlier Dream Project that eventually led into the Blue Rose Project.
It Still Has To Behave Like A G-SHOCK
Despite the materials and price, Casio has not treated the MRG-D5000 as something that should live permanently inside a display case.
It remains shock resistant and carries a 200-metre water-resistance rating.
Power comes from Tough Solar, while Multi Band 6 radio-controlled timekeeping handles automatic calibration in supported regions. There is world time across 38 time zones, a 1/100-second stopwatch, a 24-hour countdown timer, five daily alarms and a full-auto LED backlight.
One specification is particularly interesting when compared with other MR-G squares. Casio’s current MRG-D5000 specification page lists Multi Band 6 but does not list Bluetooth or Smartphone Link, both of which are present on the MRG-B5000R-1.
Visually, the watch stays close to the square G-SHOCK formula. The familiar brick-pattern display receives a blue treatment, while the MR-G logo, SHOCK RESIST lettering and other details use 24-karat gold.
A black Dura Soft rubber strap keeps the rest of the watch relatively restrained.
Only 20 examples will be produced worldwide.
Six are allocated to the United States at $80,000 each, with those watches expected to arrive in stages between December 2026 and June 2027.
At that price, comparing the MRG-D5000 with a normal digital watch does not make much sense. It is closer to an engineering exercise built around a problem Casio first showed publicly eight years ago.
Could you put sapphire around a G-SHOCK and still make it survive like a G-SHOCK?
The 2018 prototype could not.
The MRG-D5000 is Casio’s answer.
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