jargoon

In the case of jargoon, they are supposed to be caused by the presence of some uranium compound in the mineral.

Scientific American Supplement, No. 1082, September 26, 1896 Various

Opal, which is a comparatively light mineral, has a low refractive power; zircon or jargoon is a heavy mineral, and has a high refractive power.

Scientific American Supplement, No. 1082, September 26, 1896 Various

The names _hyacinth_, _jacinth_, and _jargoon_ are applied to red, yellow, and colorless zircon in the order as given.

A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade

One is the variety of red garnet known as almandine, and the other is the jargoon.

Scientific American Supplement, No. 1082, September 26, 1896 Various

In this way we are enabled to identify a jargoon or an almandine merely by looking at it.

Scientific American Supplement, No. 1082, September 26, 1896 Various

The decolorized zircon (jargoon) has a dispersion well up toward that of diamond and gives fairly vivid spectra on a card, but they are double, as zircon is doubly refracting.

A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade

Of all colorless stones, the only one likely to mislead the expert in this respect is the whitened zircon (jargoon), which has almost adamantine luster and in addition nearly as high dispersive power as diamond.

A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade

The almandine produces characteristic bands in the green and the jargoon in the red, green and blue portion of the spectrum.

Scientific American Supplement, No. 1082, September 26, 1896 Various

'Make it jargoon, dear heart,' you cried joyfully, and all was well.

The Intrusion of Jimmy 1928

Two minutes in the flame of a blow-pipe is like a week at the seashore to a bit of white jargoon.

The Intrusion of Jimmy 1928