Natural History Satin Spar Gypsum Crystal Group

A group of ten Satin Spar Gypsum crystals in individual white card display boxes with label reading: GYPSUM var. 'satin spar' Morocco. 245 grams total, 50-55mm (2 - 2 1/4"). From a historic ‘Victori

A massive piece of satin spar gypsum column with deep striations on the surface and chatoyant lustre. From the historic ‘Victorian Museum’ or later collection of Gregory, Bottley & Lloyd (Gregory'

A group of nine natural quartz crystal pendants with silver-coloured metal caps, each cap mounting three small tourmaline crystals, and one faceted amethyst drop with an electroformed cap, all in plas

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, No

A 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]

A group of fifty quartz points with clear colour and rainbow reflections. From Brazil; from the historic ‘Victorian Museum’ or later collection of Gregory, Bottley & Lloyd (Gregory's); formerly Gr

. 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, UK

A group of twenty chunks of red calcite with waxy lustre. From the historic ‘Victorian Museum’ or later collection of Gregory, Bottley & Lloyd (Gregory's); formerly Gregory, Bottley & Co. (1932-19

A group of six cut and polished purple agate geode sections, with exposed crystals; colour-enhanced. 1.39 kg total, 69-94 mm (2 3/4 - 3 3/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (

. Comprising around 80 pyrites or 'fool's gold' crystal specimens. 672 grams total, 15-36 mm (1/2 - 1 3/8 in.). From Peru. From the historic ‘Victorian Museum’ or later collection of Gregory, Bott

A group of six cut and polished agate geode slices; colour-enhanced. 322 grams total, 8.8-10.7 cm (3 1/2 - 4 1/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [6, No Reserve]

A group of eight agate geode sections. 3.5 kg total, 85-96 mm (3 3/8 - 3 3/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [8, No Reserve]

A group of six polished agate geode slices; colour-enhanced. 396 grams total, 8.7-11.8 cm (3 3/8 - 4 5/8 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [6, No Reserve]

An estate grouping of natural quartz crystals. Dimensions:Largest measures 10" Notes:We Offer Shipping! Provenance:

Gips, Gypsum crystal, Marienglas - history of this natural mineral dates back many years. Original old label from the teaching aid institute JAGER /Vienna, Austria/ authentic according to the mineralo

A large piece of gypsum, or 'desert rose', with multiple sheets of frosted white crystals flattened on the crystallographic axis, fanning open in radiating flattened crystal clusters. Found North Afri

A large piece of gypsum, or 'desert rose', with multiple sheets of white crystals flattened on the crystallographic axis, fanning open into clusters of nodules. Found North Africa; from the historic �

A 'desert rose' consisting of a number of bladed selenite gypsum crystals, several with 'hourglass' sand inclusions. See Bonewitz, Dr. Ronald Louis, Rocks & Minerals, 2008, p.212-213. 150 grams, 11.3c

A 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 Quart

A group of over 40 Iceland Spar mineral specimens; held in a cardboard box. 2.57 kg total, 35-48 mm (1 3/8 - 1 7/8 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [48, No Reser

A finely coloured group of citrine crystals from Brazil in a perspex sphere, with perspex stand. From the historic ‘Victorian Museum’ collection of Gregory, Bottley & Lloyd (Gregory's); formerly G

. A finely crystallised group of pyrite crystals with 'cube modified by octahedron' crystallisation and bright faces, from the old Gregory, Bottley and Lloyd collection from, Huanzala Mine, Ancash Pro

A very unusual quartz encrustation, originally formed over a group of calcite crystals which were subsequently dissolved away leaving the quartz coating retaining the shapes of the original calcite cr

A satin spar specimen.This large crystal of the satin spar variety of the calcium sulfate mineral gypsum displays the thick tabular crystal habit common to this variety of the mineral.No collection lo