Hornblende Gabbro Hand Sample Photos. Click on any photo for a larger image. Some of the larger images may be on other web sites and will open in a new window.

Hornblende Gabbro Thin Section

hgbrts_001. Thin section of hornblende gabbro from Salem, Essex County, Massachusetts. This sample is composed mainly of calcic plagioclase feldspar (labradorite), brown hornblende, biotite, and small amounts of clinopyroxene.



Hornblende Gabbro Thin Section

hgbrts_002. Thin section of hornblende gabbro from Gilford, VT, USA in plane polarized light (PPL). This sample is composed mainly of plagioclase feldspar and hornblende. The hornblende crystals are brown in PPL. Image from a Kurt Hollocher website, now offline. To see the original, zoomable image on ArtStor click here.