A fine example of a rare good quality Fluorite from Michigan, ex. John H. Marshall Collection. Light mint green Fluorite cubes to 1 CM in size are on and partly overgrown by Siderite. The matrix is nearly pure Siderite and the Fluorites very glasslike. Minor edge chips seen with close examination but the largest prominent crystals are fine.
An attractive calcite from the now classic location in North Vernon, Indiana. The two main crystals here (2.6 CM each) are glass clear, gemmy and enclose masses of sparkling chalcopyrite/ pyrite. There is some evidence of selective zoning in the inclusions, and the calcites are undamaged. Looks great by naked eye and mesmerizing with magnification! The best known calcite from here is golden yellow on light matrix, but this colorless type with inclusions is much less common. A very good value, great for any Calcite suite!
A Massachusetts rarity, from the John Marshall collection from a one time find over 40 years ago, during the construction of I 495. Two large, complex pyrites to 4.4 CM are perched on a jumble of micro crystals mostly Magnetites with numerous Xenotime. The right side crystal is in perfect condition, the left shows an old stress crack that is partly rehealed. An exceptional example of this find, I have not seen any better ever. Displays well.
An extraordinary, sharp and brilliant Chalcopyrite from the classic Creede district. Chalcopyrite is a delicate, brittle mineral that rarely survives without damage, it is quite rare to find really good crystal specimens. This is a very fine example with rich patina and form, individual crystals reach 2.2 CM and the overall condition is outstanding, no eye visible damage! Fine piece for the locality and for the specie.
Super deep rich color, no damage and large size from mining in the late 1950's. These are already cherished classics for their color and luster. Much more green than the usual blue color, displays well and a very good value
Classic calcite on sulfide and dolomite matrix from the great discoveries at Shullsburg. Esthetic and well presented, the calcites reach 3.2 CM. The backside isalso displayable. The front display face appears damage free (magnification finds micro nicks)there is contacting on the reverse but all in all it looks pristine. These are well respected as great and distinctive specimens, this is a good affordable example.
A very old and good example of well crystallized New Mexican Vanadinite in fine yellow prisms. There are 3 generations showing different forms on this piece, most are very sharp and lusterous. This piece dates to the late 1800's and was sold via the famous Foote minerals in Paris. Old labels included, a fine older western US specimen!
A fine old silver specimen that is nearly a solid mass of yellow-green crusts and crystals. Micro silver and sulfides are also evident. Old Wards label gives only the county location, Breckenridge was listed by John Marshall as the more precise locality. Rich and heavy piece.