Could you 3D print a fake diamond necklace like in Ocean's 8? We ask a tech expert

An image from Ocean's 8 where they print a necklace
Could you print out a necklace?

Knowing the difference between the real thing and a fake is key in Ocean's 8 so it's apt that we check out the realities of what we see in the movie in our new regular series where we ask experts in different fields to tell us what's verified reality and what's a pale imitation of the scenarios we see onscreen. Here we query the central premise of being able to knock out top quality faux diamond piece jewellery with tech in Ocean's 8.

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Sandra Bullock’s heist team produce a 3D printed replica of a priceless necklace to replace the real thing. Possible or high-carat nonsense?

Answered by Fernando Hernandez, EMEA MD of XYZprinting

From the team’s first step in producing the replica – using glasses to 3D scan the necklace – we come up against the realms of impossibility. Firstly, the glasses wouldn’t be able send data from Cartier’s subterranean vault. Secondly, getting such an accurate and detailed scan of the necklace, from a single angle, first time around, wouldn’t be possible with today’s high-end scanners, let alone a pair of glasses.

The materials used to make the necklace present further issues. The metal they use is Zirconium. It looks very similar to the metal of the original necklace but has a very high melting point – 1855oC to be precise. This is significantly above the capability of current SLM or DMLS (metal) 3D printers and will be for some time yet.

Having printed the metal, the team then move on to creating various diamonds and jewels. Crystal printing of this type doesn’t exist quite yet. At best it would be a semi-transparent resin and create an easy to spot fake. So for now, this tech is certainly not true to life. 

Verdict: A fake

This feature appears monthly in our sister publication Total Film magazine. Pick up a copy now or save up to 58% on a print and digital subscription so you never miss an issue.  

Editor-in-Chief, Total Film

Jane Crowther is the Editor of Total Film magazine and the Editor-in-Chief of the Film Group here at Future Plc, which covers Total Film, SFX, and numerous TV and women's interest brands. Jane is also the vice-chair of The Critics' Circle and a BAFTA member. You'll find Jane on GamesRadar+ exploring the biggest movies in the world and living up to her reputation as one of the most authoritative voices on film in the industry.