![]() These blades orientate (north/south) in different levels by a process known as lamellar twinning and also displays “Sagentic twinning”, which forms the lattice pattern. ![]() This forms as a very thin blades that occur in one plane at different levels (like pages in a book). Magnetite (Fe3O4) Iron Oxide which creates the lattice effect. This effect is called aventurescence, or Sunstone effect, and gives some of the gems their orange glow. Hematite (Fe2O3) - small, yellow to deep orange platelets which can be hexagonal shape and are generally in one plane within the Feldspar. With the advancement in technology over the last 3 decades, a recently conducted more in depth analysis has found the black blades and triangle inclusions in Rainbow Lattice to be magnetite.Ī paper with these results will be published soon by authors from the the Gemmological Institute, China University of Geosciences (Wuhan) and it will be published in The Journal of Gemmology by Gem-A. Whilst the initial testing of the stones inclusions conducted in 1989 (see ) concluded that the inclusions were made up of ilmenite (for the black blades and triangles) and hematite (for the orange platelets). The inclusions (internal features) are referred to as: the result of crystalographically oriented exsolution crystals within the feldspar mass. It is a type of feldspar which is predominantly Moonstone that is made up of 75% orthoclase and 25% albite. ![]() Rainbow Lattice is a very rare and unusual stone. ![]()
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