Late Victorian Antique 10K Yellow Gold Diamond Set Stickpin

Antique 10K yellow gold stickpin.  There are stampings on the pin stem that I can't make out but it does test at 10K.  The head has Etruscan wirework and in the center is an old mine cut diamond measuring approx. 2 mm set by five prongs.  The color is near colorless and its is clean under the loupe.  With magnification there is a slight chip to the girdle--not easily seen by eye. 

Could be converted to a unique pendant. 

2 7/8" length x 3/8" wide

1.2 grams 

Besides the slight nick to the girdle it is in very good condition.