Est.
$250
-$350
Sarasota Estate AuctionSARASOTA, FL
Est.
$50
-$100
Antique Arena Inc.Brooklyn, NY
Est.
€2,200
-€4,400
KUNSTAUKTIONSHAUS SCHLOSS AHLDENAhlden(Aller), Niedersachsen
Est.
€800
-€1,500
Bertolami Fine Art s.r.l.Rome, RM
Est.
€3,000
-€4,000
Bertolami Fine Art s.r.l.Rome, RM
Est.
$8,400
-$16,800
Summer AuctionEastvale, CA
![Box of Eighteen [18] Mineral and Crystal Specimen Collection: Boxed group of specimens including a hexagonal sapphire crystal, amethyst, lazurite, calcite, red jasper, quartz, malachite, prehnite(?), and others. 1.45 kg total, 0.8-11.7 cm (1/8 - 4 5/8 in.). [18,](https://p1.liveauctioneers.com/1191/426518/237925235_1_x.jpg?height=280&quality=70&sharpen=true&version=1785755501&width=280)
Est.
£40
-£60
TimeLine Auctions Ltd.Harwich, Essex
Est.
$2,000
-$3,000
NewelLong Island City, NY
Est.
$60
-$90
J. Greenstein & Co., Inc.Cedarhurst, NY
Est.
$200
-$300
J. Greenstein & Co., Inc.Cedarhurst, NY
Est.
$960
-$1,920
Crest Auction HouseEastvale, CA
Est.
€600
-€1,200
Bertolami Fine Art s.r.l.Rome, RM
Est.
€900
-€1,500
Bertolami Fine Art s.r.l.Rome, RM
Est.
€2,800
-€5,000
Bertolami Fine Art s.r.l.Rome, RM
Est.
$4,000
-$8,000
Amazing International GroupClaremont, CA
Est.
$3,000
-$6,000
Summer AuctionEastvale, CA
Est.
$3,000
-$6,000
Crest Auction HouseEastvale, CA
Est.
$800
-$1,600
Summer AuctionEastvale, CA
Est.
$4,800
-$9,600
Summer AuctionEastvale, CA
Est.
$1,200
-$2,400
Crest Auction HouseEastvale, CA
Est.
€600
-€1,200
KUNSTAUKTIONSHAUS SCHLOSS AHLDENAhlden(Aller), Niedersachsen
Est.
€280
-€560
KUNSTAUKTIONSHAUS SCHLOSS AHLDENAhlden(Aller), Niedersachsen
![Historic Roman 'Spartan Basalt' Cut Green Porphyry Strip Group: Cut and polished sections, mined in Greece, cut and polished on both sides, probably recycled material mined in ancient Roman times. 225 grams total, 4.4-15.1 cm (1 3/4 - 6 in.). [7, No Reserve] Ex Mi](https://p1.liveauctioneers.com/1191/426518/237925388_1_x.jpg?height=280&quality=70&sharpen=true&version=1785755501&width=280)
Est.
£80
-£100
TimeLine Auctions Ltd.Harwich, Essex
Est.
$500
-$750
Olde Trove Auction House IncLeesburg, FL
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