This is the yellow-green ophicalcite pebble. Dimensions: 2.2 x 1.3 x 0.5″ (5.7 x 3.2 x 1.3cm). Weight – 1.5oz (43 grams). Origin: Russia, Siberia.
Some information about ophicalcite:
Ophicalcite is a serpentinite breccia popular since ancient times as a decorative facing stone. It is a dark, dull green, white-mottled (or white-veined) serpentine, mixed with calcite, dolomite, or magnesite, which takes a high polish. It is sometimes classed, erroneously, as a variety of marble.
Non-brecciated varieties of a very similar serpentinite, sometimes also called “verd antique”, have been quarried at Victorville, California; Cardiff, Maryland; and Rochester in Addison County, Vermont.