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Silicon crystal for wireless telegraphy, mounted in a locket, 1906-1916

1906-1916

Experimental crystal multiple assembly

BT crystal 5 Mhz standard

Experimental BT crystal of 6369 kHz

Experimental BT crystal of 6378 kHz

Multiple assembly of 5 crystals near 11.5 Mhz

Small tin containing crystal for Cosmos crystal receiver, made by the Metropolitan-Vickers Electrical Company, Trafford, Manchester, England, 1920-1930

Crystal for Cosmos crystal receiver, 1920-1930

1920-1930
Residual portion of spinel crystal (magnesium aluminate) drawn from seed (each pull from seed would cost around £4000). c.1950

spinel crystal

circa 1950
Crystal for simple Gamma-ray computer

Crystal for gamma-ray computer

spectroscope stand and calcite crystal, said to have belonged to William Lawrence Bragg.

spectroscope stand and calcite crystal

Wireless Crystals (Neutron).

Wireless Crystals