Umbilicus Veneris Lapis Caimanum is a related type of stone
Gemmarum et Lapidum Historia, Tollius, 1647
Aldrovandi, Musaeum metallicum, 1648
Umbilicus Marinus (Chengdu Medicine Market, Adam 2016)
Regarded as a female ‘Yin‘ tonic, capable of strengthening Women, hindering excess Menstrual Bleeding and aiding Fertility.
For spitting of Blood, the powder can be taken with an erqual amount of Burnt Deer Horn. (Gemmarum et Lapidum Historia, Tollius, 1647)
From the Lexicon of Alchemy (1612):
“a stone or gem, sometimes of a dull-red, sometimes white or purple. It is called the Navel of Venus, being flat on one side, while the other is rounded after the manner of the belly of a beautiful girl, and has lines like the snail shell encircling it… it is found among
shells on the sea-shore. It is said to conciliate the favour of girls; it improves their figure, increases their beauty, wins love for them, and is serviceable in their special complaints”.
Umbilicus Marinus