“This is a micromount specimen of dolomite from the C.E. Duff & Son Quarry, Huntsville, Logan County, Ohio. I acquired this specimen from the giveaway tables at the 2018 Cleveland, OH Micromineral Symposium. "While the C.E. Duff and Son Inc. quarry is perhaps the premier Ohio locality for curved rhombohedral, commonly called saddle shaped, dolomite, it is without doubt the least appreciated mineral to be recovered. In part, this is due to the relative abundance of quality pink to orange dolomite crystals from other Midwestern localities. While dolomite crystals from this locality can certainly compete in form, the dull buff white to cream color is not as aesthetic or appealing as the color from other Midwestern localities including Corydon, Indiana and Rush, Arkansas. Also, dolomite crystals are fairly easy to collect throughout the quarry and occurs as cream to white rhombohedral crystals lining pockets and crevices. Most horizontal crevices in the dolomitic limestone are coated with tiny rhombohedral crystals. Although the form is curved, the smallest crystals often appear as true rhombohedrons. As these crystals become larger, the curved form becomes increasingly noticeable. Similar specimens can be found in most of the quarries throughout the Tymochtee Dolomite, but this locality is recognized as the most prolific for the species. Most collectors prefer dolomite specimens in combination with other minerals, especially pyrite" (Vasicko, 2004). Jamison K. Brizendine specimen and photo References Cited Vaschiko, J.W., 2004, Mineral habits of the C.E. Duff & Son Inc. Quarry, Logan County, Ohio: Ohio Rockhound, Vaschiko Minerals Collector’s series, Wooster, Ohio, v. 1, n. 5 ”