n.1.(Min.) A mineral occurring in greenish gray six-sided prisms, having a greasy luster. It is probably a pseudomorph after elæolite.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Pseudomorphs of muscovite: Gigantolite (after cordierite), Cataspilite (after cordierite), Pinite (after cordierite); Oncophyllite (after feldspars), Pinitoide (after feldspars); Gieseckite (after nepheline), Liebenerite (after nepheline); Gilbertite (after topas); Killinite (after spodumen); Terenite (after scapolite), Wilsonite (after scapolite).
He was (perhaps) responsible for large parts of the libretto, "The Magic Flute", but he also discovered many new mineral species including sodallite, allanite, and gieseckite, was responsible for exploring both eastern and western Greenland, and provided assistance in the planning of several arctic voyages to the Northwest Passage.
plants--to colonize), perithecium, EES eesome (attractive to the eye), teesoo (Dhak flowers) ES Esau, thesis, obese IC ici, police IES gieseckite (variety pinite), Schoenflies (mathematician) IS isblink, artiste, piste, ambergris, kris ISS pelisse (a fur garment), camiss (a Muslim shirt) OES oestrin AES aestivation, quaestor EAS Easter, yeast, grease, increase EEC fleece, Greece EIS eis-blink, leister (a fishing spear) EYS keystone IEC piece IIS iisblink (a luminous appearance on the horizon) caused by the reflection of light from ice) OEC oecist (the founder of an ancient Greek colony), dioecy IX Dix (the lowest trump in Bezique and other card games) short 's' sound followed by long 'E' sound....
What story lay behind the fact that in 1813 the very same Thomas Allan described and named gieseckite? In this description Sowerby gives us some clues as he relates: