This is a great piece with several superbly defined, sharp and highly lustrous doubly terminated Quartz crystals as so-called Herkimer-Diamonds from Middleville of Herkimer Co. And this is a truly exceptional and aesthetic cluster of Herkimer Quartz "diamonds." The fabulous, facet-like, 5.6 cm "diamond" has super clarity and amazing internal patterns. The smaller "diamonds" attached to the side look just like jewels. This is a superb, complete-all-around and pristine specimen with only one contact at a smaller crystal at the bottom of the piece. The pictures cannot convey the clarity of the crystals. Much better in person.