Phonolite from the Boca de Tauce, Tenerife.

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Sodalite

Thin section showing sodalite crystals, dark gray on LPA picture below (cubic mineral) surrounded by aenigmatite (dark brown) and aegirine  ( green needles).

Reflection images of sodalite and nepheline. 15: sodalite, darker in LPNA due to lower refraction index and 16: nepheline. In the LPA image below, both minerals cannot be distinguished from each other.

Raman spectra of sodalite and nepheline from crystals 15 and 16.

Aegirine

Green needles of aegirine around nepheline. LPNA picture above indicates a high refraction index for this mineral. White material is feldspar (below).

Aegirine Raman spectrum from the section reproduced above.