By Dan Avery For Dailymail.com
Published: 23:34 BST, 14 September 2020 | Updated: 23:34 BST, 14 September 2020
Scientists have increasing evidence that some distant planets are made of diamonds.
Stars like the Sun, with lower carbon to oxygen ratios, are typically orbited by planets composed of water and granite, with very low diamond content.
But planets circling stars with higher carbon ratios tend to be carbon-rich themselves and under the right conditions that carbon can become diamond.
To test their theory, researchers subjected a sample of silicon carbide immersed in water to intense pressure and heat using lasers and X-ray measurements.
As expected, the silicon carbide converted into diamond and silica.
While Earth is composed of mainly water and granite, exoplanets orbiting carbon-rich stars are made of diamond and silica, according to research from Arizona State University
'These exoplanets are unlike anything in our solar system,' says lead author Harrison Allen-Sutter of Arizona State University's School of Earth and Space Exploration.
His team re-created the interior of one of these planets using a diamond-anvil cell at ASU's Lab for Earth and Planetary Materials.
In a diamond-anvil cell, two gem-quality single crystal diamonds are shaped into anvils and faced toward each other.
A sample - in this case silicon carbide immersed in water - is then loaded between the flat surfaces of the diamond and compressed under high pressure.