. Bulletin - United States National Museum. Science. CATALOGUE OF GEMS AND PRECIOUS STONES. 145 spaces which are each cut into two facets. The base may be flat or the bottom may be cut like the crown, making a double rose or briolette cut. The shape of a rose-cut stone may be circular, oval, or indeed any other that the rough gem may permit. TRAr OR STEP CUT. In the trap or step cut the facets run longitudinally around the stone from the table to the girdle and from the girdle to the culet. There are usually but two or three sets of step facets from the table. Fig. 23.—Upper and under sides of
. Bulletin - United States National Museum. Science. CATALOGUE OF GEMS AND PRECIOUS STONES. 145 spaces which are each cut into two facets. The base may be flat or the bottom may be cut like the crown, making a double rose or briolette cut. The shape of a rose-cut stone may be circular, oval, or indeed any other that the rough gem may permit. TRAr OR STEP CUT. In the trap or step cut the facets run longitudinally around the stone from the table to the girdle and from the girdle to the culet. There are usually but two or three sets of step facets from the table. Fig. 23.—Upper and under sides of trap cut. to the girdle, while the number of steps from the girdle to the culet depends upon the thickness and color of the stone. The fashion is best adapted to emeralds and other colored stones. STEP BRILLIANT OR MIXED CUT. Here the form from culet to girdle is the same as that of the trap cut, while from the girdle to the table the stone is brilliant cut, or the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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