Sold2023Natural History - White Pecopteris Fern Specimen GroupDevonian Period, circa 417-354 million years B.P. Five Pecopteris sp. fern specimens on irregular matrices 3.04 kg total, 15-25 cm (6 - 9 7/8 in.). From St. Clair, Pennsylvania, USA. Acquired during tSee Sold Price
Sold2015Natural History - White Pecopteris Fern Mosaic inCarboniferous Period, 345-280 million years BP. A mosaic of white fern Pecopteris sp. specimens from St.Clair, Pennsylvania, U.S.A. 1 kg, 25.5cm (10"). Property of a Lincolnshire, UK, gentleman; acquiSee Sold Price
Sold2022White Pecopteris Fossil Fern Specimen GroupCarboniferous Period, 359-259 million years B.P. A group of two bifacial white Pecopteris sp. fern specimens. 789 grams total, 18.5 cm (7 1/3 in.). St. Clair, Pennsylvania, USA. Acquired 1980s. PradiSee Sold Price
Sold2023Natural History - British Fossil Fern GroupCarboniferous Period, circa 310 million years B.P. A group of three fern specimens including Alethopteris sp. and Sphenopteris laurenti. 281 grams total, 76-87 mm (3 - 3 3/8 in.). From the Middle CoalSee Sold Price
Sold2019Natural History - Mixed Mineral Specimen GroupA mixed mineral group comprising: a rich dark blue crystalline mass of sodalite, a concave matrix surface invested with quartz, atacamite and malachite, a rashleighite specimen, and a lustrous white mSee Sold Price
Sold2016Natural History - Muscovite and Quartz Crystal Group. A group of twelve mineral specimens of muscovite (white mica) and quartz crystals on albite, with a specimen of the zeolites stilbite and heulandite on matrix. Private collection, Cambridgeshire, UKSee Sold Price
Sold2016Natural History - Aquamarine Mineral Specimen GroupA group of four aquamarine crystals, all terminated, from Brazil, in old white card tray. From Brazil; from the historic ‘Victorian Museum’ collection of Gregory, Bottley & Lloyd (Gregory's); formSee Sold Price
Sold2016Natural History - Stibnite Mineral Specimen.A matrix specimen of radiating stibnite groups, in white card tray. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008, p.253. 70 grams, 55mm (2"). From the historic ‘Victorian Museum��See Sold Price
Sold2017Natural History - Historic Fossil Brachiopod GroupCarboniferous-Jurassic, 359-145 million years BP. A group of seven brachiopod specimens, including four spirifers (two in matrix), and three terebratulids, in old white and brown card trays with A.B.See Sold Price
Sold2017Natural History - Historic Crinoid Fossil GroupCarboniferous Period 359-299 million years BP. A group of two limestone sea-floor specimens with numerous crinoid stem segments and bryozoans from Barry, Glamorganshire, in white card trays with adhesSee Sold Price
Sold2016Natural History - Anatase on Quartz Mineral SpecimenA rare specimen consisting of numerous finely-crystallised anatase crystals encrusting a group of quartz crystals, from Norway, in old white card tray with handwritten label reading: 'Anatase on QuartSee Sold Price
Sold2016Natural History - Polished Sphere Mineral SpecimenA group of polished mineral spheres including: three brecciated jasper, unakite, snowflake obsidian, tiger iron, howlite, sodalite, each in its own labelled white card tray. From the historic ‘VictoSee Sold Price
Sold2016Natural History - Pink Dolomite Mineral Specimen.A fine group of classic, curved pink dolomite crystals on a matrix of rock dolomite, in white card tray. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008, p.181. 384 grams, 95mm (3 3/4"). From tSee Sold Price
Sold2016Six Natural History SpecimensSix Natural History SpecimensGroup of six various natural history specimens: four petrified wood pieces, stromatolite slice and orthoceras plaque; L: 11 3/4" (longest)See Sold Price
Sold2017Natural History - Mineral Specimen Group. A mixed group comprising: a galena block from Spain; a celestina block from Sicily; a large scalenahedral calcite crystal from Rumania; a block of cubic octahedral pyrite from Peru. 948 grams total,See Sold Price
Sold2022White Pecopteris Fossil Fern SpecimenCarboniferous Period, 359-259 million years B.P. A bifacial white Pecopteris sp. fern specimen in an irregular matrix. 1.2 kg, 21.5 cm (8 1/2 in.). St. Clair, Pennsylvania, USA. Acquired 1980s. PradiSee Sold Price
Sold2023Natural History - Polished Mineral Specimen GroupA mixed group of 50 polished mineral 'pebbles'. 1.12 kg total, 31-45 mm (1 1/4 - 1 3/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [50, No Reserve]See Sold Price
Sold2024Natural History - Aragonite Crystal Specimen Group [11].Comprising eleven clusters of pseudo-hexagonal twinned crystals. 313 grams total, 28-54 mm (1 1/8 - 2 1/8 in.). From Brazil.Ex Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [11, NoSee Sold Price
Sold2023Natural History - Polished Mineral Specimen GroupA mixed group of 50 polished mineral specimens of various types, including haematite, quartz, red jasper, unakite, angelite, and others. 1.19 kg total, 27-44 mm (1 - 1 3/4 in.). Mineral Imports, LondoSee Sold Price
Sold2023Natural History - Polished Mineral Specimen GroupA mixed group of 100 polished mineral 'pebbles'. 1 kg total, 20-34 mm (3/4 - 1 3/8 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [100, No Reserve]See Sold Price
Sold2019Natural History - Mixed Mineral Specimen GroupA mixed mineral group comprising: a limestone matrix with rare blue quartz inclusions, a domed basalt matrix richly covered in green olivine crystals, a powdery limestone matrix carpeted with celestitSee Sold Price
Sold2017Natural History - Stigmaria Fossil Specimen GroupCarboniferous, 359-299 million tears BP. A group consisting of four specimens of stigmaria, the roots of coal forest lycopsid trees such as Sigillaria and Lepidodendron, each with paper label attachedSee Sold Price
Sold2023Natural History - Quartz Crystal Specimen GroupA group of 50 quartz crystal specimens including clear examples with points. 1.67 kg total, 27-87 mm (1 - 3 3/8 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [50, No Reserve]See Sold Price
Sold202312 Hemimorphite White Crystals on Rust MexicoCollection of 12 Hemimorphite rock crystals. Natural History Specimen. White crystals on rust colored matrix from Mexico. Largest 6.25" From the estate of Frank Hall owner of Dover Scientific and collSee Sold Price