Ukraine · Anorthosite
also known as Ukrainian Labradorite, Blue Labradorite, Volhynian Labradorite
The most optically unique stone in the European catalogue: a dark anorthosite that displays labradorescence, a shifting electric-blue to violet iridescence caused by light diffracting within the crystal structure. Under polished finish the surface appears nearly black until it catches light, when it ignites with colour. Quarried in northwest Ukraine for over a century, used in Soviet-era monumental architecture across Kyiv and Eastern Europe. Note: commercial exports have been severely disrupted since the 2022 Russian invasion; limited stock circulates in European stone yards.
Type-level physical facts shown. Per-lot lab values (absorption, flexural strength) confirmed at quotation.
An optical phenomenon produced by light interference within alternating thin layers of differently-oriented feldspar crystals, creating a deep, shifting blue-to-violet glow that changes intensity with the viewing angle.
Supply is very limited and irregular due to the ongoing conflict in Ukraine. European stone dealers may hold pre-2022 stock; source early and verify provenance.