Natural History - Precious Opal Matrix Specimen.

A sawn block of red-brown sandstone, polished on two sides, with areas of precious opal diffracting light in primarily purples, blues and greens, in white card tray. See Bonewitz, Dr. Ronald Louis, Ro

An unusual specimen of native copper in matrix from Michigan, USA, with a sawn and polished face exposing the copper, coated with an acrilic to prevent oxidation of the copper. Found Michigan, USA; fr

A group of six pieces of gem-quality, white-base opal, from Australia, with red, blue, and green fire. Found Australia; from the historic ‘Victorian Museum’ collection of Gregory, Bottley & Lloyd

Lot of two natural specimen fossils encased in stone matrix. Measure from 1/4" - 3 3/4" in height x 4 1/4" - 5" in length. No apparent markings. Condition: Good overall condition having normal surface

A matrix specimen with numerous small crystals of the rare mineral spangolite, in white card tray with adhesive tape label reading: 'SPANGOLITE, BINGHAM'. See http://www.mindat.org/min-3721.html 210 g

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��

A group of ten specimens of dark orange opal in a matrix, each in a white card tray with label reading: 'Opal in matrix, Bocoyna, Chihuahua, Mexico'. 252 grams total, 34-46mm (1 1/4 - 1 3/4"). From a

8 Wavellite Pale Green hemispherical crystal rocks on Matrix from Arkansas. Natural History Specimen. Waverlite. Largest 7.5" x 6.5" x 3" From the estate of Frank Hall owner of Dover Scientific and co

Dimension: 5mm-17mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian

Dimension: 9.5x4cm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian L

Dimension: 70.7x60.6mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australi

Dimension: 6mm-15mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian

Dimension: 4mm-12mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian

Dimension: 12x7.5cm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian

Dimension: 5mm-18mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian

Upper Devonian Period, 370 million years B.P.. The freestanding textured matrix containing four specimens. 1.77 kg, 18 cm high (7 1/8 in.). Ex Cambridgeshire, UK, collection. [No Reserve]

Silurian Period, 400 million years BC. A free-standing pillar of orthoceras-rich matrix, with four specimens exposed and polished. 1.4 kg, 23cm (9"). From an important London collection, acquired in t

Dimension: 35x26mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian L

Dimension: 22x15mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian L

Cretaceous Period, 200-65 million years BP. Group comprising: a small ammonite, cut and polished in two halves, with two small fossil fish specimens, in matrix. 618 grams total, 3.2-14.7cm (1 1/4 - 5

Dimension: 21x18mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian L

Dimension: 91.6x46.2mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australi

Dimension: 24x22mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian L

Dimension: 24x20mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known Australian L