igneous

Que Sera Stone (Llanite)

Rhyolite containing blue quartz and feldspar

Hardness: 6-7 (Mohs scale), Color: tan to gray groundmass with dark spots and blue quartz phenocrysts, Luster: dull to vitreous, Crystal structure: microcrystalline groundmass with larger inclusions, Specific gravity: approx 2.6

Identified May 11, 2026More igneous →

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Physical properties

Formation & geological history

A porphyritic rhyolite formed from rapid cooling of volcanic magma. The most famous deposit is in the Llano Uplift of Texas, USA, dating back to the Proterozoic eon (about 1.1 billion years old).

Uses & applications

Primarily used for lapidary work, decorative carvings, points/towers for crystal healing collections, and unique jewelry pieces.

Geological facts

This specific rock is often marketed as 'Que Sera Stone' or 'Galaxite' in the metaphysical community, though geologically it is a variety of Llanite. It is unique because of the distinct blue color of its quartz inclusions.

Field identification & locations

Identified by the distinct dark 'clumped' inclusions and flashes of blue quartz within a pinkish-tan or gray rhyolite base; found predominantly in Llano County, Texas.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Magnetite

Magnetite (Fe3O4)

mineral