Anyhow larimar is also called the Atlantis stone ,dolphin stone as well as pectolite. usually it it comes in light blues to greenish colorings. And sometimes even red.

It helps bring forth guilt when you are truly guilty of something. as well as bringing a love for the user in a sense of peace and trustfulness. So if you have nothing to really feel guilty about you will feel calm. helps you recognize the bonds of this world and helps you release it. No it doesn`t give suicidal thoughts.

Helps with sales.Also helps with getting rid of entities. In chakra work it has been known to stimulate the upper four chakras. But specifically with the throat chakra.
also brings peace to the environment.

It's MOH is a 6

It's astrological sign is Leo

Caring for the stone. you should cleanse it once a week for about an hour.
As for rings. If you are near large amounts of crystals and stones(like a crystal shop) on a regular basis, you should not wear the ring as the energies will shatter it. Not just with larimar but with all stones. Metals are another matter. Just having the stone there will not effect it