"Sources connected to the couple tell us Chyna's rock is a 7 carat, round brilliant cut diamond. VS1 clarity - in a VVS diamond eternity band setting."
Baller, regarded as a celebrity jeweller confirmed that Rob had purchased one of his creations.
"Congrats to @RobKardashian & @BlacChyna on getting engaged. Rob, I have never seen you this happy before and I've known you since you were a teenager," he wrote. "I'm glad you came to your day 1 homie to get this massive [ring] for your lady. You know I don't play when it comes to diamonds. God bless #7 Carats #VVS #IFANDCO #BlacChyna #RobKardashian."
Blac Chyna, born Angela White, owns a beauty salon in LA but was also once engaged to Tyga, the father of her son King Cairo, who is three.
Tyga is now dating Kylie Jenner, Rob Kardashian's half sister.
Chyna took to Instagram and shared a video of her new bling writing: "I'm so blessed and honoured to have good man in my life, I love you @robkardashian ! #7 carats #VVS @benballer."
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Chyna meanwhile appears very serious about Rob and has been credited as helping him shed some weight. He has also been happy to get out of the house more.
The relationship has caused a rift however with the rest of his family.
His sister, Khloe, who has been his main support while battling depression, kicked him out of her home due to the relationship.
He also has a notoriously strained relationship with Kim, whose wedding to Kanye West he flew back from early after a dispute and without seeing the nuptials.
It will be interesting to see who attends the wedding from the potential groom's side if they make it to the alter.
Chyna's best friend, Amber Rose, who used to date Kanye West and has had a number of Twitter feuds with the Kardashians, took delight in congratulating the couple, calling them her "family".
"Congratulations to my Family @blacchyna and @robkardashian!!!" she wrote. "Pease don't let nothing or no one tear u guys apart! I never seen my sis so happy and I couldn't be more happy for her! Sometimes we find love in the strangest places Lol God Bless you 2! Now let's get this wedding together so y'all can start making some babies."
- news.com.au
