The hypothalamus produces thyrotropin-releasing hormone (TRH), which stimulates the pituitary gland to release thyroid-stimulating hormone (TSH).
Water Opal is a colourless, clear opal with a play of colour. It is rare and valuable in the Realms, where it is used in scrying devices.ater Opals are valuable gems in the game which may be found. This item appears in Baldur's Gate (game) , Baldur's Gate: Enhanced Edition, Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.
1 Water opal has a transparent or colorless body that may have fire in it.  Crystal opals are colorless and transparent to semi-transparent in transmitted light but with a rich play of colors in reflected light. Black crystal opals are transparent to semi-transparent with dark body color and play of color.