Est. $2,964-$3,853
BidhausNew York, NY
![Massive Congo Natural Malachite Boulder: Cut section of a boulder showing botryoidal masses. 6.36 kg, 25.5 cm (10 in.). [No Reserve] From the Democratic Republic of Congo, Central Africa. Ex Mineral Imports, London, UK. Gregory, Bottley & Ll](https://p1.liveauctioneers.com/1191/415806/231335501_1_x.jpg?height=280&quality=70&sharpen=true&version=1777479005&width=280)
Est. £200-£300
TimeLine Auctions Ltd.Harwich, Essex
Est. $13,250-$17,025
Riverside GalleriesArcadia, CA
Est. €100-€200
LA GALERIE NUMISMATIQUEVienna, AT
Est. $2,250-$3,300
NY Elizabeth Beverly Hills, CA
![Large Rose Quartz Boulder: Vibrant pink boulder of microcrystalline rose quartz. 4.13 kg, 18 cm (7 in.). [No Reserve] Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. TimeLine Auctions follows](https://p1.liveauctioneers.com/1191/415806/231335297_1_x.jpg?height=280&quality=70&sharpen=true&version=1777479005&width=280)
Est. £40-£60
TimeLine Auctions Ltd.Harwich, Essex
Est. $13,250-$17,025
Riverside GalleriesArcadia, CA
Est. $1,950-$2,860
NY Elizabeth Beverly Hills, CA
Est. $4,394-$5,712
BidhausNew York, NY
Est. $3,809-$4,951
BidhausNew York, NY
Est. $130-$169
BidhausNew York, NY
Est. $7,233-$8,137
Diamond DepotNew York, NY
Est. $4,000-$8,000
Crest Auction HouseEastvale, CA
Diamond DepotNew York, NY
Est. $600-$900
Fear Not Art GalleryRiverside, CA
Diamond DepotNew York, NY
Est. $3,725-$4,475
SEUYCORaleigh, NC
Mynt AuctionsNew York, NY
Diamond DepotNew York, NY
Est. $2,541-$2,840
Modern JewelryValley Village, CA
Diamond DepotNew York, NY
Est. $1,181-$1,320
Modern JewelryValley Village, CA
Diamond DepotNew York, NY
Est. $2,549-$2,849
Modern JewelryValley Village, CA
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