It is a twin growth

Dimensions: 55x37x11 mm / 2

He brought one to a fossil dealer and asked: "I hear that you will pay money for stones like this"

It is amazingly light considering its mass of 39x39x9 mm

At one time they where even quite common

Albite on Orthoclase | Perky Box Thumbnail Specimen | Ossipee, NH, USA Bornite It is a twin growthThis is a well formed albite that shows very well with its white cubic shiny crystal and good luster and translucence on top of a block of orthoclase crystal. This old collection specimen comes mounted in a Perky display box. Product Name: Natural Albite on Orthoclase Crystal Specimen Size: Thumbnail Sized Dimensions: 36x34x34 mm 1. 4x1. 3x1. 3 inches Box Weight: 11. 35 Grams 0. 4 Ounces (including Box) Origin: Mined in Ossipee, Carroll County, New