The fine quality mineral specimen presented in this video consist of lavender colored gem amethyst crystals on a demantoid or epidote covered host rock. This piece is from The Las Vigas Claim, Veracruz, Mexico. It is 7 cm across.
Amethyst is the purple quartz variety. Quartz is silicon dioxide which crystalizes into the hexagonal crystal system. Quartz crystals are typically hexagonal prisms and can have hexagonal bipyramidal terminations on both ends but just one termination is more likely to be present if terminated at all. Quartz crystal genesis at Veracruz is as a result of deposition of silicon dioxide from aqueous solution. Quartz crystals that occur in granites and pegmatites owe their genesis to crystalization from molten rock which is primarily a mixture of mica, feldspar and quartz. Quartz crystals that line geodes like those found in Rio Grande do Sol in southern Brazil are more enigmatic insofar as their genesis is concerned.
Veracruz has produced fine quality amethyst specimens in a slow but continual trickle since the 1970’s. Fine Veracruz amethyst specimens will never be very common because the demand will always exceed the supply. The Las Vigas claim is remote and the civil unrest that afflicts all of Mexico could only have a detrimental effect on the supply chain on fine quality Veracruz amethyst.
Amethyst occurs at different localities all over the world. The most prolific amethyst producing area is definitely Rio Grande do Sol in southern Brazil and Artigas, Uruguay where amethyst crystals line the walls of large geodes. Fine quality amethyst also occurs at Brandberg and Gobobseb. At Brandberg, Namibia amethyst sometimes occurs with prehnite. Quartz crystals that are part amethyst and part citrine are found near Santa Cruz in the tropical lowlands of Bolivia. Ametrine is the varietal name applied to this part amethyst and part citrine variety. Amatitlán, Eduardo Neri Municipality, Guerrero, Mexico is another important Mexican amethyst producing locality. At At Amatitlan, amethyst was found in the context of a gold mine.
Amethyst also occurs in Australia but Australian localities are minor in terms of the volume of amethyst that they have produced. Amethyst specimens from Australian localities would fit in a worldwide amethyst collection but be minor specimens when compared with amethyst specimens from other parts of the world. Amethyst occurs at Kuridala in Cloncurry Shire of Queensland. Most Kuridala amethyst on the market is damaged because it has not been collected skillfully or in a way to avoid damage. Amethyst also occurs at Wave Hill in the Victoria-Daly region of The Northern Territory. Amethyst also occurs at Wyloo Station in the Pilbara region of the state of Western Australia. Most of the amethyst recovered from Wyloo consist of damaged single crystals that are so dark that they are practically black. Amethyst occured as small lustrous pale purple crystals with pale pink rhodochrosite at Broken Hill, New South Wales. Amethyst scepters have also been found near Wangaratta in north eastern Victoria but not in any quantity. Scepter amethyst has occured at various small deposits in the Harts Range. The best known Harts Range ametehyst locality is Entia Valley on Ambalindum Station.
CASH PAID FOR fine quality specimens of amethyst and other quartz varieties. Cash also paid for fine and esthetic mineral specimens from Tsumeb, Mapimi, Bisbee, Broken Hill, Burra, Mount Isa, Cobar, Cloncurry, Biggenden or any other mineral specimen producing locality in Australia or anywhere in the world. Contact Matthew Webb by email at firstname.lastname@example.org. Alternatively on Ph/WhatsAp +61414990210.