Blue Pearl is a dark gray to charcoal stone shot through with crystals that flash blue, silver and occasionally gold when light strikes them at the right angle. The base reads as a deep, even gray, and the shimmer sits within the stone rather than on top of it.
Walk past a Blue Pearl counter and the surface shifts as the light catches it from a new angle. Stand still, and it settles back into plain gray.
Where Does Blue Pearl Granite Come From?
It is quarried in Norway, in the Larvik region south of Oslo. Geologically the rock is a larvikite, named after that same area, rather than a true granite in the strict petrological sense.
The stone trade has classified it as granite for decades and it behaves like one in every way that affects a kitchen. Norway is the only commercial source, which is part of why it costs what it does.
Why Does It Shimmer?
The flash comes from the feldspar crystals in the stone. Light enters a crystal, reflects off its internal layers, and those reflections interfere with one another, cancelling some wavelengths and amplifying others.
What reaches your eye is a flash of blue, silver or gold depending on the angle. The effect is a genuine optical property of the rock rather than anything done to the surface during polishing.
What Does GT Mean?
GT is a grade designation. Blue Pearl is sold in several grades that differ in the density and size of the shimmering crystals, and the grade affects both appearance and price.
Compare grade rather than name when quotations diverge. Two suppliers quoting Blue Pearl can be describing visibly different material.
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