Machine Gun Kelly proposed to Megan Fox with a nontraditional Toi et Moi setting ring Tuesday. .

Fox and Machine Gun Kelly both shared the news Wednesday on Instagram.

The diamond and emerald ring is estimated to be valued around $300,000, jewelry expert and designer Mark Broumand told FOX Business.

"The emerald and diamond are approximately 6 carats each and they indeed look to be top quality, putting the ring cost around $300,000.".

Machine Gun Kelly proposed to Megan Fox with a nontraditional Toi et Moi setting ring Tuesday.

Fox's engagement ring is "unique" due to the emerald and diamond stones chosen and the Toi et Moi setting, according to Shelley Brown, senior fashion and beauty editor of The Knot. .

"Megan Fox's engagement ring is unique due to both its setting and choice of center stones: It's a nontraditional Toi et Moi setting with magnetized bands that connect a pear-shaped diamond and an emerald to form a two-toned heart," Brown told FOX Business.

Megan Fox and Machine Gun Kelly both shared the news Wednesday on Instagram.

The ring features two center stones, a diamond and emerald