05/31/2013 at 11:00 AM EDT
Just like her engagement to Liam Hemsworth
has been on and off
, so has Miley Cyrus
's engagement ring.
Until now. She's been wearing the ring consistently the past few weeks and is even flashing it, as shown here during a video shoot in L.A. Thursday.
Hemsworth, 23, and Cyrus, 20, "are still living together but have no wedding plans," a source tells PEOPLE. "They still need to work on their relationship, but after they decided to postpone the wedding, they are doing better. They feel less stress and less pressure now. Miley can focus on her music."
She announced at the Billboard Music Awards
that her new single, "We Can't Stop," will debut June 3.
Cyrus had been photographed sometimes with
and other times without
the ring in the past few months. The vanishing and re-appearing act was taking place even before the couple's wedding was postponed
amid talk that they had split
As PEOPLE reported exclusively
, Hemsworth approached celebrity jeweler Neil Lane to create a ring for Cyrus to mark their engagement
, he wanted "something unusual," said Lane. "Something really beautiful and romantic."
The result: a 3.5-carat cushion-cut diamond ring, handcrafted in 18-karat gold with intricately carved diamond floral motifs in an art nouveau pattern. And the center stone is extra special: it's an antique dating back to the late 19th century.
"It was hand-cut around 1880 or 1890 and it's unique and in its original form," according to Lane. "At that time no two diamonds were alike, as they were all hand-cut, so it's fascinating to look at because it hasn’t been re-cut to look contemporary over the years. I find that really romantic."