In 1950 Dr. C.V. Raman (father of Raman Spectroscopy) published the discovery of a colorless Quartz that exhibits adularescence, or iridescence. It occurs in druse veins emplaced in basalts, and it has also been discovered in Argentina on the slopes of a volcano. Jack has found a good source for very fine specimens from India, and we now offer them on this website. We call it Rainbow Quartz; locality is Madhya Pradesh, India.
It is difficult to capture all the colors that a specimen displays in a photo. Rest assured that these specimens will show neon color in nearly all the crystals on a specimen, changing as the specimen is viewed from different angles. The colors are due to polysynthetic twinning in the crystal; and this is not the same as interference pattern rainbows seen in fractures of clear quartz. The cause of this structure in basalt related quartz has not been determined.
Amethyst discovered by Jack Lowell in Uruguayan Basalts exhibits this optical phenomenon and is named Lowell Effect Amethyst by the Gemological Institute of America.
Mahdya Pradesh, India
Excellent plate of multicolored "neon" lights inside of colorless quartz. Difficult to show all the crystals do show lights in a photo. This is natural, not manmade or artificial! Neon effect
Very rare transparent quartz crystals with irridescent orange rhombonedral faces with green accents. difficult to photograph, but most crystals show the effect when rotated in light source. We will include a copy of the 1950 scientific paper on this discovery by Sir CV Raman.
Of all the Rainbow Quartz we have received, this piece has the best "lights" of all. Many crystals at once show green, orange, or blue neon faces. Very rare specimen. The optical phenomena (Irridescent faces in Quartz) was first described by CV Raman in 1950. We can give you a copy of the article in the Indian Academy of Sciences.
AAA Rainbow Quartz. Only from India, this quartz was first described in an article in the Indian Journal of Sciences CRYSTALS OF QUARTZ WITH IRIDESCENT FACES by sir C. V. raman who also discovered Raman Spectroscopy.(From the Raman Research Institute, Bangalore) Received May 10, 1950. Hard to photograph the intensity of the green blue and orange colored face reflec
Large plate of Quartz crystals showing neon colors, green, blue and orange depending on the crystal. Colors visible even in low light. Hard to photograph, amazing irridescence. Only found in India though a small amount was found at a Volcano in Argentina. We have the best, it is related to our discovery of Adularescence in Amethyst, named the Lowell Effect by the Gemolog