Bloodstone forms at shallow depths at low temperatures when silica-rich groundwaters precipitate in shallow cavities and fractures inside rocks.
The best Bloodstone has always been found in the Deccan trap-rocks of the Kathia peninsula in India.
This is an area where very large lava flows built up over thirty thousand years to form layers of Basalt 2000m or 6,600 feet thick.
This eruption happened 66 million years ago and the massive release of Sulpher Dioxide helped to create a mass extinction effect through massive climate change.
Bloodstone is also found in Western Australia, China, Brazil, Madagascar, Canada, Germany, Bulgaria, Czech Republic, Romania, Slovakia, South Africa, Uruguay, and the United States.