A Carved rock crystal pommel, probably Fatimid Egypt, 10th-12th century

of cylindrical form with faceted sides, carved in the form of stiff pointed leaves, drilled through the centre, the drill hole 1.3cm across 

In fair overall condition, fissures, small knocks and abrasions to the end edges, as viewed.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

For a related piece, compare the rock crystal mace-head attributed to the reign of al-Hakim (r.996-1021) in the Museum of Islamic Art, Cairo (ex-Hariri Collection, inv.no.15445) (London 1976, no.105, p.126; Trésors Fatimides du Caire, Paris, 1998, no.86, p.140; Schätze der Kalifen, Islamische Kunst zur Fatimidenzeit, Vienna, 1998, no.105, pp.132-33). However, given the diminutive scale of the present piece it seems unlikely that it was used as a mace-head.