An anecdote from Hz.Ali(r.a) who collects the essence and secrets of the science himself in refer to the creatures. 
A quatotation concerning with the issue from the book named “Menakib-i Cihar -i Yar-i  Guzin”
which Seyyid Eyyub bin Siddik wrote is as follow:


54th Anecdote: While Hz.Ali “Radiyallahu Teala Anh”was watching around at the edge of the river of Firat, saw a man who got drowned in the river. When he arrived next to him, he saw a ring made of Yemen gemstone in the little finger of the dead man. He got suprised and asked the crowd around him, what thing did cause this man to die?  Owing to the order of Allah-u Teala (c.c -God), he got drowned in the river.
Hz.Ali “Radiyallahu Teala Anh” told that “ a man who wears Yemen gemstone on him should not get drowned in the river. They told what the secret is in this case” and started to thinking over the case.


In order that Hz. Ali “Radiyallahu Teala Anh” could get rid of this suffering and anguish, Allah-u Subhanehu Teala Celle Celaluhu bestowed the grace and the gemstone on the ring of the dead man started to speak and told to Hz.Ali as follow:
“Hey Ali! The Gemstone from Yemen has got that feature which you mentioned. But, i am not from Yemen. I am the Stone from India. I haven’t got that feature.
“ Hz Ali heard this and thanked Allahu Subhanehu Teala and Tekaddes (God) for this.


He told the crowd around him like that, the feature which is necessary to rescuing the people from drowning in the river is available in Yemen gemstone thanks to the help of the God. Other stones haven’t got this feature. Since then, the gemstone
from Yemen has had in good savour, it became a ring on the fingers. This story was narrated by an Arabian narrator.