The 27-year-old was seen at Cartier in Beverly Hills on Thursday, September 2, TMZ reported.
An employee in the store reportedly brought out what appeared to be a diamond ring for him to get a closer look at. The outlet noted that it wasn't clear if Asghari purchased a ring during the trip.
"I want to be able to get married and have a baby," Spears previously told the court during a testimony concerning her conservatorship in June. "I was told I can't get married. I have an IUD inside me but this so-called team won't let me go to the doctor to remove it because they don't want me to have any more children. This conservatorship is doing me way more harm than good."
The pop icon and Asghari met in 2016 when he was cast in her "Slumber Party" music video. They hit it off and have been going strong ever since. According to an OK! insider, the "Circus" singer has wanted to tie the knot with her beau for some time now.
"This has been her heart’s desire for a long time," the insider spilled. "Britney’s said her piece. Now she’s eager to move on and begin a new life with Sam — and have a baby."
"She thinks Sam will be a wonderful husband because he’s already a very loving and caring boyfriend, and she knows he’ll be a great dad," the source added.
Another OK! insider said that the pair "know time is of the essence," as Spears is turning 40 in December. "They're going into this with positive vibes and believe it will happen."
"Sam is so wonderful and giving with Britney's boys," the insider gushed. "She knows he'll be an amazing father."
Spears shares sons Sean, 15, and Jayden, 14, with ex-husband Kevin Federline.