OpalPop
Heart of Atlantis | Vintage Modernist Green-Blue Australian Boulder Opal & Diamond Pendant in 18k Gold
Heart of Atlantis | Vintage Modernist Green-Blue Australian Boulder Opal & Diamond Pendant in 18k Gold
Free USPS Priority shipping for all U.S. orders. California orders subject to sales tax at checkout.
Couldn't load pickup availability
Introducing "Heart of Atlantis,"
A 1980s 18k Gold & Diamond Modernist Pendant Featuring a Blinding Green, Collector-Grade Boulder Opal with Non-Directional Fire
Crafted from solid 18k yellow gold, this 1980s-era pendant was acquired from a Beverly Hills estate and features a collector-grade Australian boulder opal. Weighing over 10 grams and measuring a substantial 1.6” long, the Modernist architecture achieves a surprisingly elegant aesthetic given its statement-worthy size. The pendant is engineered with a sturdy clip-on enhancer bail that integrates seamlessly with the overall design, allowing the piece to be securely affixed over thick chains, gold omegas, or heavy pearl strands. Two tube-set VS2-clarity diamonds (0.07ctw) accent the opal.
The architectural centerpiece is a massive, freeform boulder opal sourced from Queensland, Australia. Defying standard photographic capture, the B5-rated intense green play of color exhibits true non-directional fire, leaping from the stone’s dark N5 body tone at every viewing angle. Enchanting layers of deep blue and purple play beneath the dominant green surface, providing a three-dimensional depth rarely found in standard boulder opal specimens.
Measuring approximately 1.1” long as set, the opal exhibits a highly coveted “clean face”—meaning no ironstone inclusions interrupt the flow of precious opal across the stone’s primary viewing surface. Unlike man-assembled imitations, this is a solid, natural stone; the seam of precious opal formed organically over its host ironstone matrix, clearly visible in the profile gallery images.
Whether acquired for investment or wear, this piece is a true gemological marvel. A complimentary 18” gold-plated sterling silver rope chain is included so the pendant can be worn immediately upon arrival.
For collectors seeking a similar aesthetic in a more understated scale, explore our Atlantic Sunrise Modernist-style Australian boulder opal and diamond pendant, which features a flatter profile and a wider spectrum of visible color play.
More Information...
The Center Stone: Natural Dark Boulder Opal, solid
- origin: Queensland, Australia
- shape: polished freeform
- stone measurements (millimeters): 27.07mm x 14.41mm
- stone measurements (inches): 1.1" x 0.6"
- brightness of color play: B5 of 5
- body tone: N5
- color play description: vivid green and blue-only
- additional notes: clean face
The Accent Stones: Diamond, natural
- stone count: 2
- total estimated carat weight: 0.07ct
- cut: Standard Round Brilliant Cuts
- average clarity grade: VS2
- average color grade: H-I-J
The Setting: Modernist-Style Pendant with Clip-On Enhancer Bail, chain included
- pendant metal: 18k yellow gold, solid
- chain metal: .925 sterling silver, gold-plated
- pendant length (including bail): 40.87mm (1.6")
- pendant width: 20.21mm (0.8")
- bail opening width: 5.9mm, clips on
- pendant weight: 10.32 grams (not including chain)
- chain weight: 8.03 grams (not including pendant)
Share

OpalPop Customer Reviews
Explore Similar Opal Necklaces & Pendants in These Curated Collections:
All Opal Necklaces • 18k Gold Opal Necklaces • Boulder Opal Necklaces • Australian Opal Necklaces • Modernist Opal Necklaces • Opal Necklaces Over $5,000
Still searching? We've got even more opal jewelry below...
-The OpalPop Shop-
Browse the most comprehensive opal jewelry shopping experience the American web has to offer. From opal necklaces and opal rings, to free Priority Mail shipping with every U.S. order and 14 day returns, we've got just what you're looking for.
-
Marmalade | Le Vian Ethiopian Opal & Diamond Halo Necklace in 18k Rose Gold
Regular price $9,800.00 USDRegular priceUnit price / perSale price $9,800.00 USD -
Jericho | Men's Australian Boulder Opal Ring in Sterling Silver with 21k Gold Nuggets
Regular price $1,480.00 USDRegular priceUnit price / perSale price $1,480.00 USD -
Sinatra | Men's Australian Opal Inlay & Diamond Pendant in 18k Gold, c.1980s
Regular price $6,880.00 USDRegular priceUnit price / perSale price $6,880.00 USD -
Cortney | Natural Coober Pedy White Opal Tennis Bracelet in 10k Gold, 7.5 Inches
Regular price $1,680.00 USDRegular priceUnit price / perSale price $1,680.00 USD -
Heart of Atlantis | Vintage Modernist Green-Blue Australian Boulder Opal & Diamond Pendant in 18k Gold
Regular price $8,800.00 USDRegular priceUnit price / perSale price $8,800.00 USD -
Frieren & Fern | Lightning Ridge Dark Opal Dangle Earrings in 14k Gold
Regular price $2,680.00 USDRegular priceUnit price / perSale price $2,680.00 USD -
Hualālai | Australian Boulder Opal Necklace in Platinum with Platinum Chain, c.1950s
Regular price $14,800.00 USDRegular priceUnit price / perSale price $14,800.00 USD -
Abby | Multi-Stone Mexican Fire Opal Necklace in Sterling Silver
Regular price $125.00 USDRegular priceUnit price / perSale price $125.00 USD -
Adelaide | Notably Colorful Ethiopian Opal & CZ Ring in Sterling Silver
Regular price $185.00 USDRegular priceUnit price / perSale price $185.00 USD -
Ahava | Israeli Designer Opal, Garnet, & Amethyst Heart Necklace in Sterling Silver
Regular price $325.00 USDRegular priceUnit price / perSale price $325.00 USD -
Alice | Antique English Butterfly Wing & Opal Necklace in Sterling Silver, c.1920s
Regular price $380.00 USDRegular priceUnit price / perSale price $380.00 USD -
Alina | 1.88ct Lightning Ridge Black Opal & Diamond Ring in Platinum
Regular price $2,880.00 USDRegular priceUnit price / perSale price $2,880.00 USD