Prompt: Make the gem a Sapphire
Negative prompt: Blurry, Blur, Grainy, Oversaturated, Tiling, Draft, Out of frame, Out of Focus, Cut off, Cropped image, Text, Signature, Watermark, Low quality, Bad quality, Low res, Plastic, 3D,  Childish, Ugly, Bad anatomy, Deformed, Disfigured, Two heads, Two faces, Long neck, Long body, Long limbs, Poorly drawn face, Poorly drawn eyes, Poorly drawn hands, Poorly drawn feet, Poorly drawn limbs, Extra limbs, Extra heads, Extra eyes, Extra arms, Extra hands, Extra legs, Extra feet