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LARGE COLLECTION OF GREY BOTSWANA AGATE TUMBLED STONES: A collection of seven Botswana agate banded chalcedony specimens featuring gray and brown banding with strong fortification patterns, including one example with moss inclusions. Condition: All specime

Jun 11, 2026

LARGE COLLECTION OF GREY BOTSWANA AGATE TUMBLED STONES

Est. US$50-US$100

US$25

Dan Morphy AuctionsDenver, PA

FEATURED

Van Cleef Arpels Magic Alhambra Blue Agate Long Chain 18K Yellow Gold Pendant Necklace: Description: Elegant Van Cleef Arpels Magic Alhambra long chain necklace crafted in 18K yellow gold, featuring a striking blue agate motif. The design is framed by the Maison signature beaded gold bor

2 days Left

Van Cleef Arpels Magic Alhambra Blue Agate Long Chain 18K Yellow Gold Pendant Necklace

Est. US$5,500-US$7,500

US$2,500

Victorins AuctionsTokyo, Setagaya City

Mid-Century Brutalist Brass Choker with Light Blue Agate Pendant: Mid-Century Brutalist Brass Choker with Light Blue Agate Pendant Discover a stunning mid-century brutalist choker necklace featuring a captivating large light blue agate stone set within a uniquely cr

May 25, 2026

Mid-Century Brutalist Brass Choker with Light Blue Agate Pendant

Est. US$2,808-US$3,650

US$100

Mynt AuctionsNew York, NY

Sasanian Banded Agate Stamp Seal with Wolf: Circa 3rd-7th century A.D. With possibly later frieze of an advancing wolf beneath a crescent moon 11.85 grams, 24.10 mm (1 in.). [No Reserve] From the private collection of a European gentleman (1942

Jun 05, 2026

Sasanian Banded Agate Stamp Seal with Wolf

Est. £60-£80

£5

TimeLine Auctions Ltd.Harwich, Essex

Large Sasanian Agate Stamp Seal: Circa 4th-5th century A.D. With inscribed geometric design to the underside. 16.25 grams, 26.35 mm (1 in.). [No Reserve] From the private collection of a European gentleman (1942-2024), formed since t

Jun 04, 2026

Large Sasanian Agate Stamp Seal

Est. £40-£60

£5

TimeLine Auctions Ltd.Harwich, Essex

Victorian 18k Gold Agate Cameo Stick Pin Antique Collectible: Victorian 18k Gold Agate Cameo Stick Pin Antique Collectible This exquisite antique Victorian collectible features a petite stick pin crafted from solid 18k yellow gold. At the centerpiece is a natura

3 days Left

Victorian 18k Gold Agate Cameo Stick Pin Antique Collectible

Est. US$442-US$574

US$100

BidhausNew York, NY

LARGE COLLECTION OF 16: RED AGATES: A collection of sixteen banded agate nodules formed in volcanic rock cavities. These banded chalcedony quartz specimens display red and brown coloration from iron and mineral impurities, with concentr

Jun 11, 2026

LARGE COLLECTION OF 16: RED AGATES

Est. US$100-US$150

US$50

Dan Morphy AuctionsDenver, PA

Collection of Ten [10] Cut and Polished Agate Geode Slices: Comprising ten translucent slices, some with crystalline areas. 1.02 kg total, 9.8-18.5 cm (3 7/8 - 7 1/4 in.). [3, No Reserve] From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (G

Jun 06, 2026

Collection of Ten [10] Cut and Polished Agate Geode Slices

Est. £40-£60

£5

TimeLine Auctions Ltd.Harwich, Essex

Sasanian Banded Agate Stamp Seal: Circa 3rd-7th century A.D. With incuse geometric motif to the underside. 1.28 grams, 12.17 mm (1/2 in.). [No Reserve] From the private collection of a European gentleman (1942-2024), formed since the

Jun 05, 2026

Sasanian Banded Agate Stamp Seal

Est. £60-£80

£5

TimeLine Auctions Ltd.Harwich, Essex

Cut and Polished Agate Geode Slice Group: Comprising six translucent slices showing red, orange and grey banding together with colourless quartz crystal formations. 392 grams total, 13.2-13.8 cm (5 1/4 - 5 3/8 in.). [6, No Reserve] Ex Mineral

Jun 06, 2026

Cut and Polished Agate Geode Slice Group

Est. £30-£40

£5

TimeLine Auctions Ltd.Harwich, Essex

Set of Six [6] Cut, Polished and Felt-Backed Agate Coasters: Comprising six polished slices in gently graduated sizes, cut from the same geode. 372 grams total, 8.8-10.2 cm (3 1/2 - 4 in.). [6, No Reserve] Ex Mineral Imports, London, UK. Gregory, Bottley & Lloy

Jun 06, 2026

Set of Six [6] Cut, Polished and Felt-Backed Agate Coasters

Est. £20-£30

£5

TimeLine Auctions Ltd.Harwich, Essex

Western Asiatic Agate Bead Collection: 1st millennium B.C. Comprising mainly biconical and tubular beads in various sizes. 54.56 grams total, 2.62-29.14 mm (Largest: 1 1/8 in.). [49, No Reserve] From the private collection of a European ge

Jun 04, 2026

Western Asiatic Agate Bead Collection

Est. £100-£140

£5

TimeLine Auctions Ltd.Harwich, Essex

Ten [10] Mixed Cut and Polished Agate Geode Half Group: Each showing a crystal-lined cavity and some with attractive banding, one with globular pink formations within the cavity. 1.18 kg total, 50-85 mm (2 - 3 3/8 in.). [10, No Reserve] From Brazil. Ex Min

Jun 06, 2026

Ten [10] Mixed Cut and Polished Agate Geode Half Group

Est. £30-£40

£5

TimeLine Auctions Ltd.Harwich, Essex

Greek Agate Gemstone with Running Hound: Circa 300-200 B.C. With intaglio running hound; chipped; supplied with a museum-quality impression. 0.53 grams, 11.01 mm (3/8 in.). [No Reserve] From the private collection of a European gentleman (19

Jun 03, 2026

Greek Agate Gemstone with Running Hound

Est. £100-£140

£5

TimeLine Auctions Ltd.Harwich, Essex

Cut and Polished Agate Crystal Geode Pair: Comprising two halves from the same geode, showing contrasting, nearly straight banding at the bottom with a quartz crystal-filled cavity above. 1.08 kg total, 10.9-11 cm (4 1/4 in.). [2, No Reserve]

Jun 06, 2026

Cut and Polished Agate Crystal Geode Pair

Est. £30-£40

£5

TimeLine Auctions Ltd.Harwich, Essex

Collection of Six [6] Cut and Polished Agate Geode End Pieces: Comprising six freestanding sections, three with enhanced dyed colouring. 3.05 kg total, 10.4-14.8 cm (4 1/8 - 5 7/8 in.). [6, No Reserve] Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gre

Jun 06, 2026

Collection of Six [6] Cut and Polished Agate Geode End Pieces

Est. £40-£60

£5

TimeLine Auctions Ltd.Harwich, Essex

Collection of Ten [10] Cut and Polished Agate Geode Halves: Each with one or two cut faces exposing the internal structure, some showing crystal formations. 3.22 kg total, 76-85 mm (3 - 3 3/8 in.). [10, No Reserve] Ex Mineral Imports, London, UK. Gregory, Bott

Jun 06, 2026

Collection of Ten [10] Cut and Polished Agate Geode Halves

Est. £40-£60

£5

TimeLine Auctions Ltd.Harwich, Essex

Large Polished and Felt-Backed Agate Coaster Set of Six [6]: In graduating sizes and showing contrasting banding. 756 grams total, 9.7-13.9 cm (3 7/8 - 5 1/2 in.). [6, No Reserve] Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK

Jun 06, 2026

Large Polished and Felt-Backed Agate Coaster Set of Six [6]

Est. £20-£30

£5

TimeLine Auctions Ltd.Harwich, Essex

Group of Ten [10] Cut and Polished Agate Geode Halves: Comprising ten cut and polished halves, each showing a crystal-lined cavity. 1.23 kg total, 60-77 mm (2 3/8 - 3 in.). [10, No Reserve] From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & L

Jun 06, 2026

Group of Ten [10] Cut and Polished Agate Geode Halves

Est. £30-£40

£5

TimeLine Auctions Ltd.Harwich, Essex

Sterling Silver Bolo Tie with Dendritic Agate Tree Pattern by Stan Davidson: Sterling Silver Bolo Tie with Dendritic Agate Tree Pattern by Stan Davidson This vintage bolo tie features a custom-cut natural dendritic agate in a striking tree formation, bezel set in sterling silv

3 days Left

Sterling Silver Bolo Tie with Dendritic Agate Tree Pattern by Stan Davidson

Est. US$442-US$574

US$100

BidhausNew York, NY

Group of One Hundred [100] Polished Agate Pebbles: An attractive group of decorative tumbled agate pebbles. 1.05 kg total, 22-37 mm (7/8 - 1 1/2 in.). [100, No Reserve] From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's),

Jun 06, 2026

Group of One Hundred [100] Polished Agate Pebbles

Est. £20-£30

£5

TimeLine Auctions Ltd.Harwich, Essex

10.60 CT LAPIDARY AGATE FOR MOUNTING: 10.60CT. PROVENANCE: STOCK OF A RETIRED JEWELER.

5 days Left

10.60 CT LAPIDARY AGATE FOR MOUNTING

Est. €50-€100

€20

Templum Fine Art AuctionsBarcelona , ES

Vintage 22k Yellow Gold Pendant with Banded Agate and Diamonds: Vintage 22k Yellow Gold Pendant with Banded Agate and Diamonds This exquisite vintage pendant showcases the artistry of handmade craftsmanship, featuring a stunning 22k yellow gold design. The centerp

May 27, 2026

Vintage 22k Yellow Gold Pendant with Banded Agate and Diamonds

Est. US$2,015-US$2,619

US$100

BidhausNew York, NY

May 31, 2026

AGATE K10YG QUARTZ FRESHWATER PEARL EARRINGS

Est. US$1,725-US$2,530

US$25

NY Elizabeth Beverly Hills, CA

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