Titanite var. Sphene
4.8 x 4.2 x 2.8 CM (miniature)
A choice cluster of old time Sphene crystals with a small bit of matrix. In person these are quite gemmy, very transparent and have fantastic growth structures on several faces. In fine condition there is one small chip on a crystal edge that is the logical base of the specimen and not visible on display.
Ex Commercial Mineral Corp (a NYC based dealer) The label for this dates after 1956 though the vintage is likely mid sixties. Ex Charles M. Noll and Jimmie Dufoe collections as well. Presents well from several angles, best appreciated in person.
A fine twinned Sphene crystal is perched like an arrow on the matrix. Small adhering crystals of Schorl, Adularia and Clinoclore add some extra sparkle. The Titanite is very sharp, lustrous and gemmy in areas. Very fine condition, magnification finds some small contacts but otherwise in great shape and damage free.
A super esthetic stack of perfect Adularia crystals in epitaxial arrangement hosting gem clear Titanites. Some selective coating of Chlorite on crystal faces of the Adulariaadds some contrast as well. This is a 360 degree piece it looks fine on all sides and has a strong esthetic arrangement. The main Titanite is 8mm perfect, gem clear flat prism with bright luster. A few tiny Quartz crystals are mixed into the matrix as well, overall a super fine arrangement of Alpine species.
A brazillian specimen that was mined over 25 years ago. Very sharp, glassy twinned Sphenes on matrix up to 2.5 CM on matrix. The matrix is also covered on both sides with a druse of micro Titanite crystals that sparkle nicely. Some of the tiny Titanites seem to be untwinned which is rather rare but is known in a few specimens from this locale. The main crystals are well exposed from the matrix and show well from several angles. Some damage and contacts can be found on close exam but these do no stand out. The price reflects this, a good value for a very displayable specimen.
Vintage specimen with old EB Underhill label. Underhill donated his collection posthumously to Amherst College in 1888, so this piece and his handwritten label is older than that. Not many of these labels survive today and the Sphene specimen is also a very rare example from a classic locale. I have never seen another quite like this, the luster is very bright on the slender dark gem clear crystals in the protected vug. Microscope reveals tiny Clinochlore and what may be colorless Fluorites, not known from this locale. A nice slice of mineral history.
An old Swiss classic Alpine specimen. Complexly structured matrix hosts several minerals in layers with gemmy green Titanites on the top. Beds of Bysollite needles have well crystallized Adularia protruding and micro sprays of Apatite throughout. This displays the complex nature of mineralization in Alpine clefts very well. The Titanites crystals are up to 1 CM though most are smaller. Ex Charles M. Noll and Jim Dufoe collections.
Titanite v. Sphene
5.6 x 5.5 x 5.1 CM (cabinet)
A sharp and "monumental" looking cluster of Titanite in crystals to 3.1 CM. Transparent and with a good green color, some faces are smooth and glass clear and others have micro steps and a more etched look. Unknown inclusions add a little red zoning in a few spots. In very good condition for the specie, esthetic.
Gemmy twin crystals with sharp edges and bright luster on a contrasting matrix. In good condition overall but with some edge chipping, hence more affordable. This is from finds made in the 1990's which had especially good color.