Prasolite
Name for afibrous leek green variety of the chlorite group, from Kilpatrick Hills, Scotland. An aluminosilicate of magnesium and iron, probably a variety of chlorite.…
Category: Gem or Scam? Library
Prase Opal
A long-standing name for a green variety of opal. Nowadays the name chrysopal is also used for the green nickel-containing opal from Kosovo, among other…
Preseli Bluestone / Preseli Spotted Dolerite
Local name for a chemically converted igneous rock (dolerite) found in the Preseli Mountains in Pembrokeshire, Wales, United Kingdom, but the stone is best known…
Prophecy Stone / Z-Stone
Commercial name for a star-shaped pseudomorph of goethite after marcasite. Originally formed as marcasite crystals on the sea floor, later converted to iron hydroxides, mainly…
Pruskite
Trade name for lab-grown crystals on matrix, usually made in Poland. The crystals can be either yellow (potassium hexacyanoferrate, containing divalent iron) or red (potassium…
Prystine / Prystyne
Trade name name for a dense, fine-grained, pure white variety of magnesite from a site on the Utah-Nevada border in the United States. Unclear whether…
Purple Angeline™
Unregistered commercial name for material allegedly composed of the following mineral combination: amethyst, smoky quartz and cacoxenite. Another variation of Agape crystal® and related names…
Quantum Quattro
Commercial name for a combination of (smoky) quartz with chrysocolla, malachite, shattuckite and dioptase from Namibia. In the examples studied, the quartz, chrysocolla, malachite and…
Rainbow (Dali) jasper
Misleading commercial name for a red and white banded calcite; the stone contains no jasper or quartz at all. Inclusions of probably iron in the…
Recordkeeper
Esoteric designation for triangular patterns on one or more crystal surfaces. Initially so called only in quartz, but more and more also in other minerals…
