Amethyst

Origin: Jacksons Crossroads, near Rayle, Wilkes Co., Georgia, U.S.A.

Sample size: 6.7 x 6.5 x 6.2 cm

Amethyst scepter

Origin: Ambohimasina, Madagascar

Sample size: 4.6 x 2.6 x 2.4 cm

Origin: Amatitlan, Guerrero, Mexico

Ex. Rosenberg collection

Sample size: 8.1 x 7.9 x 4.5 cm

Origin: Brandberg, Erongo Mtns., Namibia

Sample size: 6.6 x 1.9 x 1.8 cm

Origin: Las Vigas, Veracruz, Mexico

Sample size: 4.7 x 2.6 x 2.5 cm

Photo courtesy of:

Rob Lavinsky

The main amethyst crystal, which is 3.1 cm in length, is both sceptered and windowed. A few of the larger side crystals are also doubly-terminated. In addition, the crystals are slightly included with red lepidocrocite; this can only be seen (at least with my eyes!) under magnification. In addition, the crystals have deep color and sharp zoning. The smaller crystals are smoky quartz which appear to be covered by an overgrowth of milky quartz.

Origin: Goboboseb Mountain, Brandberg Area, Erongo Region, Namibia

Ex. Ed Rosenzweig collection

Sample size: 10.4 x 6.0 x 5.3 cm

Photo courtesy of:

John Veevaert, Trinity Mineral Co

Trinityminerals.com

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Rock crystal Smoky quartz Citrine Rose quartz Milky quartz Included quartz Other quartz types Agate Chalcedony Jasper

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Physical, chemical and crystallographic description

Optical properties/Thin sections

SEM images

TEM images

vibrational spectra description

IR spectra

N-IR spectra

F-IR spectra

IES spectra