3.1" Druzy Amethyst "Stalactite" Formation - Morocco

This is a unique formation of quartz crystals with some amethyst coloration, collected from Tarazout, Sidi Rahal, Morocco. There are both druzy and slightly larger individual quartz crystals scattered throughout this specimen. Stalactite-like mineral formations can be seen beneath the druzy quartz layer. The red coloration of the quartz/amethyst can be attributed to hematite inclusions.

The mines near Tarazout, Sidi Rahal, Morocco have produced these very mysterious, beautiful and rare quartz perimorph geodes for the past 30 years. For many years they were referred to has psuedomorphs or quartz after other minerals, but they are perimorphs. Perimorphs differ from Pseudomorphs because they do not replace the earlier mineral but rather form a crust on top of it. In this case it's quartz/amethyst over an undetermined earlier mineral which has dissolved away.

They are found within a hard basalt, and contain very unique forms which has sometimes earned them the name "stalactitic quartz geodes".

Amethyst is a purple variety of quartz (SiO2) and owes its violet color to natural irradiation, iron impurities, and the presence of trace elements, which result in complex crystal lattice substitutions. It’s considered a semi-precious gemstone, and just two centuries ago was considered to have a value on par with diamonds, sapphires and rubies. The largest and best known amethyst deposits occur in southern Brazil and Uruguay but many localities around the world produce an amazing variety of amethyst crystals and formations.

Hematite is a fairly common mineral, typically responsible for the red-brown coloration that can be found in other minerals and rocks. The chemical composition of hematite is Fe2O3, occasionally containing small amounts of titanium (variable formula (Fe,Ti)2O3). Much of the time, non-crystalline hematite specimens are the result of a transformation from limonite following loss of water.
DETAILS
SPECIES
Quartz var. Amethyst & Hematite
LOCATION
Tarazout, Sidi Rahal, Morocco
SIZE
3.1 x 2.3"
CATEGORY
ITEM
#127986