Blue Pearl is a dark gray to charcoal stone shot through with crystals that flash blue, silver and now and then gold whenever light meets them at the right angle. Its base reads as a deep, even gray, and the shimmer lives inside the stone rather than on the surface.
Walk past a Blue Pearl counter and it shifts as the light finds a fresh angle. Stand still and it settles back into plain gray again.
Where Does Blue Pearl Granite Come From?
Quarrying happens in Norway, in the Larvik region south of Oslo. In strict petrological terms the rock is a larvikite, named for that same area, rather than a true granite.
For decades the stone trade has filed it under granite, and in every respect that touches a kitchen it behaves like one. Norway being the only commercial source is part of why it costs what it does.
Why Does It Shimmer?
Responsibility for the flash lies with the feldspar crystals. Light goes into a crystal, bounces off its internal layers, and those reflections interfere with one another, canceling some wavelengths while amplifying others.
What comes back out is blue, silver or gold according to where you are standing. This is a genuine optical property of the rock, not something done to the surface at the polishing stage.
What Does GT Mean?
GT is a grade designation. Blue Pearl comes in several grades that differ in how dense and how large the shimmering crystals are, and grade drives both appearance and price.
Compare grades rather than names when two quotations disagree. Suppliers can both write Blue Pearl and mean visibly different material.
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