All the details on Jessica Biel's engagement ring!

Finally, after months of hiding her massive rock, Jessica Biel has shown it off, and we even have all the details behind it!

Although Biel has been attending red carpet events since the news broke of her engagement to fianc Justin Timberlake, her newest and most beautiful accessory was always kept out of the public eye.

After nearly three months of keeping the bling from us, she was spotted with her engagement ring on at a Lakers game held at the Staples Center on March 12, Just Jared is reporting.

The sparkler on Biel's finger is described as having "scrolling rope-style sides [which] provide a vintage element, but the blackened platinum gives this style a modern twist," Michael O'Connor, a jewelry expert, told Us Weekly.

The impressive diamond in the center, said to be either radiant or princess-cut, has a weight of six carats and a price tag of approximately $130,000, OConnor told the mag.

Biel and Timberlake have dated on-and-off for five years, making things official once again after he put a ring on it sometime in December.

The duo plan to wed at some point this year. "The big day's this summer at a private estateMonique Lhuillier is [Jessica's] No. 1 choice for the dress," a source close to the situation told Us Weekly.

Although Biel publicly stated last year that she's one of those girls who doesn't dream about getting married or finding Prince Charming, she clearly has both now!