Est.
$600
-$800
STAIRHudson, NY
Porphyry Porphyry
(33 upcoming items)
Est.
$75,000
-$100,000
Five Star AuctionsPasadena, CA
Est.
$40,000
-$70,000
AUCTION ONEBeverly Hills, CA
Est.
$1,200
-$1,800
Millea Bros LtdBoonton, NJ
Est.
$2,000
-$3,000
Millea Bros LtdBoonton, NJ
Est.
$800
-$1,200
DOYLE Auctioneers & AppraisersNew York, NY
Est.
$500
-$1,000
New England Auctions - Fred GiampietroBranford, CT
Est.
£100
-£140
TimeLine Auctions Ltd.Harwich, Essex
![Historic Roman 'Spartan Basalt' Cut and Polished Green Porphyry Sheet Group: Cut and polished sections, mined in Greece, cut and polished on both sides, probably recycled material mined in ancient Roman times. 221 grams total, 11.9-14.5 cm (4 3/4 - 5 3/4 in.). [2, No Reserve]](https://p1.liveauctioneers.com/1191/415806/231335290_1_x.jpg?height=280&quality=70&sharpen=true&version=1777475205&width=280)
Est.
£100
-£140
TimeLine Auctions Ltd.Harwich, Essex
Est.
$8,000
-$10,000
Louvre Antique AuctionLos Angeles, CA
Est.
(2 bids)
£600
-£800
£300
(2 bids)BonhamsLondon, UNITED KINGDOM
Louvre Antique AuctionLos Angeles, CA
Est.
£400
-£600
TimeLine Auctions Ltd.Harwich, Essex
Est.
£1,000
-£2,000
Sworders Fine Art AuctioneersEssex, UK
Est.
£800
-£1,200
Dreweatts Donnington PrioryNewbury, Berkshire
Est.
€3,200
-€4,000
Gorny & Mosch GmbHMunich, Bavaria
Est.
€30,000
-€50,000
Christie'sParis, FR
Est.
€5,000
-€8,000
Christie'sParis, FR
Est.
€4,000
-€6,000
Christie'sParis, FR
Est.
€5,000
-€7,000
Christie'sParis, FR
Est.
€2,000
-€3,000
Christie'sParis, FR
Est.
€3,000
-€5,000
Christie'sParis, FR
Est.
€2,000
-€3,000
Christie'sParis, FR
Est.
€1,500
-€2,500
Christie'sParis, FR
Porphyry Auctions
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