From the Buffalo Seed Company:
 
"TOMATO (Solanum lycopersicum) Indeterminate (75-85 days) — This ridiculously gorgeous cherry tomato, along with it's close relative Blue Goldberry, is among the most productive tomatoes that we steward. Early season the tomatoes form a purple top fading into green. As they transform into the summer the bottom of the fruits become primarily red. We were shared seeds from a kind spirit in Napa, California. This one produces, produces, produces, and produces. No signs of splitting and no signs that the dynamic Midwest climate has any negative impact on production quality. While Blueberry Cherry primarily expresses red it sometimes has some yellow as we pulled this back out of Blue Goldberry. This variety is dynamite."