We made this run with real silver and cullet from the Pennsboro Alley Agate marble factory which made marbles between 1932-1936.   This is a  15/16" and is slightly out of round as were most this size.   It has green aventurine and silver melted from sterling silver.   I also put a 50 pound bucket of Alley cullet in the furnace.       Please review feedback going back over 24  years at the same E-Bay location.  I  have spent hours researching old WV marble companies and as a social worker traveling  the back-roads of WV  providing counseling services to children and their families.   Many of the people I worked with had marbles or knew someone who did.  What started as a hobby grew into an E-Bay enterprise.   I got permission from owners and dug 10 different WV old marble sites from Ravenswood to Clarksburg.  So I have many, many marbles.   Send me an E-Mail for your marble needs.   I answer all respectful questions.  Shipping ALWAYS combined when possible.   Please wait for  combined invoice if purchasing multiple items.  A proud USAF Veteran offering honest services and speedy delivery.  Please contact me if dissatisfied with any purchase.