![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](https://p1.liveauctioneers.com/1191/415806/231335393_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est. £20-£30
TimeLine Auctions Ltd.Harwich, Essex
Est. $2,015-$2,619
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),](https://p1.liveauctioneers.com/1191/415806/231335315_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est. £20-£30
TimeLine Auctions Ltd.Harwich, Essex
Est. $1,725-$2,530
NY Elizabeth Beverly Hills, CA
![Set of Three [3] Cut and Polished 'Eye' Agate Geode Slices: Comprising three transparent slices from the same geode showing an eye-like pattern. 155 grams total, 13.5-14 cm (5 1/4 - 5 1/2 in.). [3, No Reserve] From Brazil. Ex Mineral Imports, London, UK. Grego](https://p1.liveauctioneers.com/1191/415806/231335494_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est. £20-£30
TimeLine Auctions Ltd.Harwich, Essex
Est. $676-$878
BidhausNew York, NY
Est. $585-$760
BidhausNew York, NY
Est. $1,937-$2,518
Mynt AuctionsNew York, NY
![Collection of Three [3] Cut and Polished Malawi Agate Geode Halves: Comprising three specimens with polished cut faces, showing strong banding and crystal-lined interior. 2.12 kg total including box, 9.2-16 cm (3 5/8 - 6 1/4 in.). [3, No Reserve] From Malawi. Ex Miner](https://p1.liveauctioneers.com/1191/415806/231335351_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est. £30-£40
TimeLine Auctions Ltd.Harwich, Essex
Est. $1,352-$1,757
BidhausNew York, NY
Est. $1,352-$1,757
Mynt AuctionsNew York, NY
Est. $962-$1,250
BidhausNew York, NY
![Ten [10] Mixed Cut and Polished Agate Geode Slices From Brazil: Comprising ten translucent to opaque slices, some showing quartz crystals, two dyed. 540 grams total, 5.2-13.4 cm (2 - 5 1/4 in.). [10, No Reserve] From Brazil. Ex Mineral Imports, London, UK. Gregory](https://p1.liveauctioneers.com/1191/415806/231335503_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est. £20-£30
TimeLine Auctions Ltd.Harwich, Essex
Est. $100-$200
Bryant Art AuctionPlacentia, CA
![Sasanian Banded Agate Stamp Seal with Star: Circa 3rd-7th century A.D. With incuse star and tree design. 1.55 grams, 15.24 mm (5/8 in.). [No Reserve] From the private collection of a European gentleman (1942-2024), formed since the 1970s. TimeL](https://p1.liveauctioneers.com/1191/415804/231332336_1_x.jpg?height=280&quality=70&sharpen=true&version=1777474526&width=280)
Est. £40-£60
TimeLine Auctions Ltd.Harwich, Essex
![Roman Agate Gemstone with Fortuna: 2nd-3rd century A.D. With intaglio Fortuna standing with cornucopia in one hand; supplied with a museum-quality impression. 0.31 grams, 11.36 mm (3/8 in.). [No Reserve] From the private collection of](https://p1.liveauctioneers.com/1191/415803/231330436_1_x.jpg?height=280&quality=70&sharpen=true&version=1777474167&width=280)
Est. £100-£140
TimeLine Auctions Ltd.Harwich, Essex
Est. $585-$760
BidhausNew York, NY
![Collection of Three [3] Cut and Polished Agate Geode Ends: A boxed group of three polished geode sections showing contrasting colours and banding. 2.77 kg total, 9.6-19.6 cm (3 3/4 - 7 3/4 in.). [3, No Reserve] Ex Mineral Imports, London, UK. Gregory, Bottley](https://p1.liveauctioneers.com/1191/415806/231335359_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est. £40-£60
TimeLine Auctions Ltd.Harwich, Essex
![Roman Agate Gemstone with Seahorse: 2nd-3rd century A.D. With intaglio seahorse in profile with tail raised; supplied with a museum-quality impression. 0.33 grams, 11.12 mm (3/8 in.). [No Reserve] From the private collection of a Europe](https://p1.liveauctioneers.com/1191/415803/231330750_1_x.jpg?height=280&quality=70&sharpen=true&version=1777474167&width=280)
Est. £100-£140
TimeLine Auctions Ltd.Harwich, Essex
Est. $1,313-$1,706
BidhausNew York, NY
Est. £30-£40
TimeLine Auctions Ltd.Harwich, Essex
Est. $585-$760
BidhausNew York, NY
![Sasanian Banded Agate Stamp Seal with Portrait: Circa 3rd-7th century A.D. With incuse profile bust with beard. 1.64 grams, 11.42 mm (1/2 in.). [No Reserve] From the private collection of a European gentleman (1942-2024), formed since the 1970s. Ti](https://p1.liveauctioneers.com/1191/415804/231332436_1_x.jpg?height=280&quality=70&sharpen=true&version=1777474526&width=280)
Est. £40-£60
TimeLine Auctions Ltd.Harwich, Essex
![Large Sasanian Agate Stamp Seal: Circa 4th-5th century A.D. Plano-convex in section with incised geometric motifs. 15.99 grams, 26.69 mm (1 in.). [No Reserve] From the private collection of a European gentleman (1942-2024), formed si](https://p1.liveauctioneers.com/1191/415804/231332506_1_x.jpg?height=280&quality=70&sharpen=true&version=1777474526&width=280)
Est. £40-£60
TimeLine Auctions Ltd.Harwich, Essex
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