This mermaid is based on a white damselfish and has her gemstone on her navel.

The emerald mermaid is based on an emerald catfish lol. Emerald is associated with the heart.

This mermaid is based on a squid and has her gemstone on her head because diamonds are associated with the mind.

A better picture this time! I decided to base this mermaid on a bluefin tuna.

Here's my sketch for garnet. Garnet is associated with passion and the heart, so her gemstone is on a necklace so it rests against her heart. Also, she's based on a lion fish.

Missed the first day but oh well. I decided to do a series of mermaids for this challenge! The amethyst mermaid is based on a bottlenose dolphin and has an amethyst gem in the crown on her head because amethyst is associated with the mind. Sorry about the bad quality pic though, my phone's camera isn't very good. I'll update if I get the chance to clean it up in Photoshop.

EDIT: Added wip of the cleaned up photoshop version