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.
Photo: Opalite. Opal is a hydrous silicon dioxide mineraloid (it has no crystalline structure, and between 10% to 20% water content). There are 2 groups of Opal: Precious Opal (play of colour) and Common Opal (no play of colour). Light diffracts into a spectrum of colours through ordered micro-silica spheres within Precious Opal.