Chalcedony, Silver Opal

[Ed Pennebaker]

I melted a new color this week. It looks pretty good but I would like a little more red tone to it. It is a dark amber in transmitted light. Recipe for 100 pounds Spruce Pine Color Base
300 gm zinc oxide
280 gm black tin
46 gm silver nitrate
20 gm red iron oxide
melted at 2125, taken up to 2260 7 hours after last charge.
Fairly seedy first day, fewer very small seeds second day.

Should I use a little less red iron or less silver nitrate?