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Wireless detector crystals: Copper Pyrites

Wireless detector crystals: Copper Pyrites

crystals pulled from seed

crystals pulled from seed

circa 1950

Crystals resembling olivenite from a furnace bottom

Crystals resembling olivenite from a furnace bottom

1870

Heated crystals in metal mounts (a) Felspar E79-'77

Heated crystals in metal mounts (a) Felspar E79-'77

A selection of crystals made from BSCCO superconductor

A selection of crystals made from BSCCO superconductor

1997

Specimen of antimony, with leather stand. "Star of Antimony"

Star of antimony

Four groups of natural crystals: quartz, fluorspar, sulphur and iron pyrites

Quartz crystals

Collection of 7 off quartz crystals (1940s) comprising:- (1) Type 6A No.1 - 877 KHz; (2) FT-171-B by Bliley Elect Co., Erie, Penna, Ex BC610 - 1746 KHz; (3) B7G based, type 942 - 4195 KHz; (4) GEC metal based - 2500 KHz probably; (5) TMV 87-A4 - 4637.5 KHz; (6) CR-1A/ AR CZX - 6727.77 KHz; (7) CR-1A/AR CUR - 6497.77 KHz

Collection of 7 Off Quartz Crystals (1940s)

1940-1949

Three examples of crystal remnants pulled from seed - one silicon, one germanium, one unknown.

crystals pulled from seed

circa 1950

Potassi ferricyanidum crystals in polythene bag, English, 1871-1920

Potassi ferricyanidum crystals in polythene bag

Copper salt in envelope, presented by Field Museum of Chicago, probably from Afghanistan, 1900-1930

Copper salt in envelope

1900-1930

Crystal block of barytes, from Eller Beck Mine, Westmorland, 1881-1899

Crystal block of barytes

1881-1899

Star of antimony

Star of Antimony

Crystals resembling olivenite from a furnace bottom, Morfa Silver Works, Swansea, 1870

Crystals resembling olivenite from a furnace bottom

1870

Plastic packet labelled 'Perfect Health' containing blue and white stones and crystals, 1996.

Plastic packet labelled 'Perfect Health' containing blue and white stones and crystals

1996

Sulphur trioxide crystals, in hermetically sealed bottle.

Sulphur trioxide crystals

Crystals for X-ray polychromator on Solar Maximum Mission satellite: (1) quartz (2) germanium

Crystals for X-ray polychromator on Solar Maximum Mission satellite

Unidentified white crystals, from portable chemical cabinet

Unidentified white crystals

Jar of unknown cystals, from portable chemical cabinet

Jar of unknown cystals

Specimen of calcium salt (?) crystalline formation prepared from solution on wooden stick, English (?), 1801 to 1930

Specimen of calcium salt (?) crystalline formation

1801-1930

Series of five alum crystals showing transition from octahedron to cube.

Series of five alum crystals

Unworked mass of silicon carbide (carborundum) crystals

Unworked mass of silicon carbide (carborundum) crystals.

A selection of crystals made of various superconducting oxides, by the Department of Physics at Oxford University, 1997

Crystals made from Superconducting Oxides

1997

3 packets of "Persifoot" crystals, by J.W. Ross, Worthing

3 packets of "Persifoot" crystals, by J.W. Ross, Worthing