This is an amazing, large cluster of many "tangerine" quartz crystals from Madagascar. The entire plate is 16.5" long and up to 10.5 wide. The largest crystal on the piece is about 3.4" from the base to the tip. Beautiful coloration and sharp crystals on this spectacular plate with magnificent transparency through some of the crystals.
View Video Of Specimen
These clusters are natural and not heat treated or coated. The orange color is due to a combination of Iron, Hematite and Manganese coating the surface of the crystals but may also be present as inclusions within the crystals themselves. A likely cause is a high iron content in the soil where these crystals are found.
Lower quality material often with lots of surface damage is present on the market from Brazil, but this is some of the first high quality, natural specimens I've seen from Madagascar.