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Labradorite, a feldspar mineral, can display an iridescent optical effect (or Schiller) known as labradorescence. It is an intermediate to calcic member of the plagioclase series. The streak is white, like most silicates. As with all plagioclase members, the crystal system is triclinic. It occurs as clear, white to gray, blocky to lath shaped grains in common mafic igneous rocks such as basalt and gabbro, as well as in anorthosites.
Spectrolite is an uncommon variety of labradorite feldspar, which exhibits a richer range of colors than labradorite. Spectrolite was initially a brand name for material mined in Finland, but is sometimes used to describe labradorite whenever a richer display of colors is present, regardless of locality.
Polished Slices, from UK
SIMILAR TO SEEN: The image shows an example of the single specimen you will receive. This will be picked from our stock box graded and with a size within the minimum and maximum size range indicated. It will not be the exact specimen in the photo, the colours, shape, size and style may vary as with any natural item. To guarantee the specimen you receive will be representative by that in photo, we would always recommend the Actual as seen version of this item.