gold sandwich glass
... that ancient Romans marked and decorated their graves in the Catacombs of Rome with the broken-off bottoms of drinking cups with designs in gold sandwich glass ?
... that ancient Romans marked and decorated their graves in the <a href="./Catacombs_of_Rome" id="mwCgk" rel="mw:WikiLink" title="Catacombs of Rome">Catacombs of Rome</a> with the broken-off bottoms of drinking cups with designs in <b id="mwCgo"><a class="mw-redirect" href="./Gold_sandwich_glass" id="mwCgs" rel="mw:WikiLink" title="Gold sandwich glass">gold sandwich glass</a></b> <i id="mwCgw">(example pictured)</i>?