EDINGTONITE
Specimen edg-4

Dims: 2.8" x 2.6" x 1.7" (7.1 x 6.6 x 4.3 cm)

Wt: 6.26 oz. (177.6 g)

Ice River, British Columbia, Canada

This specimen's host rock is at least 40% covered with a cluster made up of hundreds of small, white Edingtonite crystals. They measure no longer than 0.3" (8 mm) and are generally in excellent condition, showing a small amount of damage. Close examination of the crystals reveals their tetragonal prismatic crystal form which is topped by wedge-like terminations whose contact edges are truncated by two secondary faces, giving the appearance of four-sided pyramids. They have a white color and a pearly luster, and are translucent to nearly transparent. There is an interesting spot on the cluster that I believe shows where it came into contact with the face of a rhombohedron- the depression in the cluster is in the shape of a partial rhombus, and there is a tiny bit of calcite stuck in one corner. This cluster coats a base that consists of another single, large rhombohedral calcite crystal that is heavily damaged but still has definite form. It is a dull, off-white color and is translucent with a pearly luster.

Dims: 2.9" x 1.8" x 1.6" (7.4 x 4.6 x 4.1 cm)

Wt: 3.94 oz. (111.9 g)

Ice River, British Columbia, Canada

A crust made up of scores of small, white Edingtonite crystals coats the crystalline calcite host rock of this specimen. The Edingtonite crystals are in very good condition, with damage mostly limited to the crystals along the crust's edge. They do not exceed 0.2" (5 mm) in length and their tetragonal prismatic form is well-defined. They have a white color and a pearly luster, and range from translucent to nearly transparent. The calcite that acts as their base is in the form of a few intergrown rhombohedral crystals that show considerable damage. Some of the calcite has a brighter color than most of it, and almost appears to be striated, but it is definitely calcite, and has probably taken on the tendencies of a mineral that was adjacent to it.

Dims: 1.4" x 0.9" x 0.8" (3.6 x 2.3 x 2.0 cm)

Wt: 15.6 g

Ice River, British Columbia, Canada

This thumbnail specimen consists of a crust of tetragonal prismatic Edingtonite crystals that partly covers a crystalline calcite base. These crystals do not exceed 0.1" (3 mm) in any dimension, and show very good form and only a small amount of damage. They have a milky-white color and a pearly-to-vitreous luster, and are translucent. The calcite base on which they rest is rounded, but shows definite rhombohedral forms. The crystals are a dull yellow color and are translucent and cloudy.

Dims: 2.0 x 1.4 x 0.8" (5.0 x 3.6 x 2.1 cm)

Wt: 1.7 oz. (48 g)

Ice River, British Columbia, Canada

This hand specimen consists of a crust of tightly arranged Edingtonite crystals that rest on a crystalline calcite base. These Edingtonites are generally in very good condition and reach about 5 mm in length. All have excellent orthorhombic prismatic form and have the standard white color and pearly luster of the specie. They are all translucent and cover most of the calcite base.