The 24K GOLD iPhone case owned by Kylie Jenner and Khloe Kardashian

When you buy a brand new phone you have two options; protect it from the world in a military-standard thick case, or, of course, cover it with priceless diamonds.

As it turns out, some A-listers, like Kylie Jenner and Khloe Kardashian, have gone for the latter and bought some of the most luxurious iPhone cases out there.

Plated in 24-karat gold, the stars of ‘Keeping Up with the Kardashians’ each spent $599 (£504) on the Golden Concept cases.

But these aren’t the only stars to own luxury accessories, as the company also sells the world’s most expensive Apple Watch case.

Crafted from a single block of aerospace-grade titanium, this ‘Diamond Edition’ case contains 443 diamonds, bringing the value to a whopping $15,000 (£12,500).

They’re only owned by seven people in the world, including Middle Eastern royalty and a chart-topping American rapper — though the company’s CEO, Puia Shamsossadati, wouldn’t reveal exactly who.

“We’ve had some unusual requests over the years,” he told MailOnline.

“One of them asked for an iPhone case with the image of the Hindu god Ganesha, cast in solid gold and encrusted with diamonds. It cost almost a quarter of a million dollars.’

He added that because of their talent, products have also been ordered by adult film companies, who had their signatures engraved.

‘We clearly have something for everyone!’ Mr Shamsossadati told MailOnline.

Based in Malmö, Sweden, the businessman claims that the Golden Concept products are the modern day equivalent of owning a luxury car, and the “opposite of plastic accessory fast-fashion.”

All precious cases are shipped in recyclable, engraved wooden boxes.

Mr Shamsossadati said: ‘Objects such as a telephone or a watch are constantly used and viewed, and other people see you with them as well.

“It’s hard to stand out when, with regard to the iPhone, hundreds of millions of people have the exact same product as you.

“We let people express their personality through their accessories.”

But the Kar-Jenners aren’t the only celebs to flaunt an array of bling on their gadgets, as Brazilian footballer Neymar Jr. owns at least three Apple Watch cases worth $1,999 (£1,653) each.

These are made of gold-plated stainless steel or titanium adorned with 200 Swarovski crystals.

Football legend Lionel Messi and hitmaker DJ Khaled also have 18-karat gold iPhone cases worth a whopping $5,000 (£4,142).

But some smartphone case designers put function over fashion, and one from Mous saved an iPhone 14 from a bungee jump.

Mous CEO and co-founder, James Griffith, took part in the terrifying jump, dropping Apple’s flagship smartphone from 60 feet off the ground.

Amazingly, both the smartphone and the smartphone case passed the test unscathed.

“I’m not sure what’s scarier – jumping from that high or throwing a brand new iPhone 14!” he joked.

However, both Mous and Golden Concept have yet to push ahead with the next big trend in smartphone cases: artificial skin.

Scientists at the University of Bristol have developed a prototype skin that they say can be wrapped around devices such as smartphones to provide a “more natural interface.”

Designed to resemble and mimic human skin, it responds to various forms of human contact, such as tickling, caressing and pinching.

The researchers say their work opens the door to a possible future with “anthropomorphic devices” – where gadgets have human characteristics.

The artificial skin is made using two layers of silicone – the so-called ‘dermis’ and ‘hypodermis’ layers – with an electrode layer in the middle consisting of ultra-thin wires that act as sensors.

Two different types of silicone were dipped in pigment and molded to give the creation a skin-like texture.

The researchers said their artificial skin allows devices to “feel the grip of the user” and detect “interactions such as tickling, caressing, even twisting and squeezing.”