The spectroscope and gemmology
GemStone Press, 1998 - Antiques & Collectibles - 269 pages
Contents include the history and development of spectroscopy; a discussion of the nature of absorption spectra and the absorption spectra of solids and gem minerals; the many uses of the spectroscope and the spectrophotometer; light sources and the causes of color; absorption in synthetic gemstones; and more. Written for gemologists everywhere and incorporating the latest developments, The Spectroscope and Gemmology is an indispensable textbook for professional and amateur gemologists and students of gemology.
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absorption bands absorption lines absorption spectra alexandrite aluminium apatite appearance aquamarine atoms band centred blue and violet BLUE I GREEN BLUE VIOLET 700 broad absorption broad band Burma Chelsea filter chromium chromium lines chromium spectrum chrysoberyl cobalt colour colourless copper corundum crystal dark deep red demantoid detected diagnostic diamond didymium diopside distinctive doublet elements emerald emission lines enstatite faint ferric ferrous iron ﬂame ﬂuorescence line Fraunhofer garnet gem minerals gemmologist gemstones give glass GREEN BLUE VIOLET instrument intense jadeite kornerupines luminescence magnesium manganese measurements narrow band narrow line natural observed orange ordinary ray peridot pink polaroid pyrope rare earth red spinel reﬂected light refractive index ruby similar sinhalite slit sodium spec specimens spectrograph spectroscope spessartite spinel spodumene Sri Lankan stones strength strong band strongest synthetic spinels tion tourmaline transmitted trum ultra-violet uranium usually vague band VIOLET I BLUE visible wavelengths yellow zircon