Bulgari B.zero1 Necklace (18k rose gold)

A ring for the millennium

Bulgari introduced B.zero1 in 1999. The name was meant to read as the B of Bulgari and the 'zero.1' of infinite beginnings, a fitting title for a design timed to the turn of the millennium. Bulgari's archive director has described it as designed to celebrate the new millennium.

The look came from two places. The first was the Colosseum in Rome: the stacked, curving tiers of the amphitheater translated into a ring of bands. The second was Bulgari's own Tubogas technique, the coiled, solder-free gold band the house had made famous in the 1970s. B.zero1 wound the Tubogas idea into a spiral around a hollow cylindrical core, framed by two rims engraved with the Bulgari name.

Bulgari's own description of the necklace calls B.zero1 'a true icon since 1999' and describes the rose gold chain and pendant as channeling 'the timeless aesthetics of Roman architecture' with an avant-garde identity.

Artists, architects and a perfect mistake

Bulgari has kept reinventing B.zero1 by inviting outside designers in. In 2010, for the collection's tenth anniversary, the British sculptor Anish Kapoor reworked the spiral with a mirror-like interior surface, pairing pink gold with steel. In 2012 came rings with bands of green, brown and blue marble, and in 2014 the B.zero1 Roma ring, in pink gold and bronze ceramic, marked Bulgari's 130th anniversary.

The architect Zaha Hadid began discussing a version with Bulgari's chief executive, Jean-Christophe Babin, in Milan in April 2015. Hadid died before it was released; the B.zero1 Design Legend, with her signature undulating, crisscrossing lines, was presented in 2017 in rings and pendants. In 2016 Bulgari also released the B.zero1 Perfect Mistake, built from a second prototype made back in 1999 that had not come out as intended, in pink, white and yellow gold.

In February 2020 Bulgari presented a unisex version called B.zero1 Rock in New York; its chief executive described it as more masculine and attractive to men. Rock has since grown to include necklaces, rings and bangles.

1999 and after

The collection arrived in a year obsessed with new beginnings. The euro was established on January 1, 1999, and the millennium was months away. B.zero1 was conceived as a modern answer for that moment, a piece of jewelry that looked industrial and architectural rather than precious.

It worked. By 2019, when Bulgari celebrated the 20th anniversary with a reissued five-band ring engraved 'XX Anniversary' and a campaign shot by Mario Sorrenti with Bella Hadid, more than two million B.zero1 rings had been sold. In October 2016 the Smithsonian Institution included the B.zero1 ring in a compendium of gems as a 'jewel of extraordinary design.'

The necklace and how to recognize it

The rose gold necklace, reference 335924, is a simple piece: a small round B.zero1 pendant on a fine link chain, all in 18-karat rose gold with no gemstones. One example dated to around 2020 measured 14.9 mm across the pendant and 9 mm wide, on a 1.8 mm chain 17.8 inches long that can be shortened to 16.4 or 14.8 inches, and weighed 13.1 grams.

Genuine pieces have the spiral body framed by two rims engraved BVLGARI, and are signed Bulgari with Italian hallmarks; that example also carried a serial number and came with its original box and paperwork. Bulgari notes that dimensions and weights of its jewelry are approximate, given their handmade character.

Across the wider B.zero1 line Bulgari has also used pavé diamonds, marble and ceramic, mostly in rings.

New and pre-owned

In October 2026 Bulgari's U.S. site listed the rose gold B.zero1 necklace at $4,500 before taxes. The same month, a U.S. dealer offered a pre-owned example from around 2020, with its box and papers, for $2,900, noting the $4,500 retail price.

As a current-production piece with very large sales, the B.zero1 necklace is collected less for scarcity than as an entry point to Bulgari's modern design language. Limited anniversary and collaboration versions, such as the Kapoor and Hadid editions, are the ones that stand apart.

The numbers

Reference

335924

Metal

18-karat rose gold

Pendant

14.9 mm diameter, 9 mm wide (one example)

Chain

1.8 mm wide; 17.8 in, adjustable to 16.4 and 14.8 in

Weight

13.1 g (one example)

Production

Current serial production since the collection's 1999 launch

Timeline

1. 1999

   Bulgari launches B.zero1, inspired by the Colosseum and its own Tubogas technique.

2. 2010

   Anish Kapoor reinterprets B.zero1 for its tenth anniversary.

3. 2012

   B.zero1 rings with marble bands are introduced.

4. 2014

   The B.zero1 Roma ring marks Bulgari's 130th anniversary.

5. Apr 2015

   Zaha Hadid and Bulgari's chief executive first discuss a collaboration in Milan.

6. 2016

   B.zero1 Perfect Mistake is released, based on a 1999 prototype.

7. Oct 2016

   The Smithsonian Institution calls the B.zero1 ring a 'jewel of extraordinary design.'

8. 2017

   The B.zero1 Design Legend by Zaha Hadid is presented.

9. 2019

   The 20th anniversary brings a reissued five-band ring and a campaign with Bella Hadid; more than two million rings have been sold.

10. Feb 2020

    Bulgari presents the unisex B.zero1 Rock in New York.

11. Oct 2026

    The rose gold necklace, reference 335924, lists at $4,500 on Bulgari's U.S. site.

The world in 1999

• Jan 1, 1999

  The euro currency is established and the European Central Bank assumes full powers.

• Mar 24, 1999

  NATO launches air strikes against Yugoslavia.

• Mar 26, 1999

  The Melissa virus attacks the internet.

• Aug 11, 1999

  A total solar eclipse is seen across Europe and Asia.

• Dec 31, 1999

  Panama gains full control of the Panama Canal.

Price record

This is an asking price, not a sale. It is what a seller wanted on the date shown. Asking prices often sit above what buyers pay, but an ask is not a ceiling: a sale can land on either side of it. It is not a value.

By reference price, Bulgari B.zero1 Necklace (18k rose gold) is number 93 of 100 in the jewelry entries of the FLOAT 100. 44 of those 100 rest on a realized sale; the rest carry an asking price or a guide value, and each page says which. Rank within the FLOAT 100 itself (69 here) is editorial: how much an object defines its field, not price alone.

Did you know

• B.zero1 is a Colosseum you can wear: its tiers inspired the spiral.
• The spiral is a coiled-up version of Bulgari's Tubogas gas-pipe technique.
• Bulgari has sold more than two million B.zero1 rings.
• One B.zero1 design came from a 1999 prototype that went wrong, released in 2016 as the Perfect Mistake.
• Zaha Hadid's B.zero1 was released after her death.
• The Smithsonian has called the B.zero1 ring a 'jewel of extraordinary design.'