Symptoms. Many people have no symptoms in the early stages of avascular necrosis. As the condition worsens, your affected joint may hurt only when you put weight on it. Eventually, the joint may hurt even when you're lying down. Pain can be mild or severe and usually develops gradually. Pain associated with avascular necrosis of the hip may be focused in the groin, thigh or buttock.
The Beautiful Color Blue. Blue topaz gemstone. Blue topaz can generally be found in three different shades: pale sky blue, cool Swiss blue, and deep London blue. The sparkling stones evoke images of the wind, sky, and water. Blue is the color of calm and quiet. It can help us channel relaxing energies and fight off chaos and negative emotions.
A variety of imperial topaz, this purple crystal is a rather rare color of the topaz mineral. Varying from light violet to deep purple, the violet crystal gets its color from the inclusion of chromium into the otherwise colorless mineral. Topaz in general is the gemstone of the zodiac sign Sagittarius. gemstone found in all the colors of the rainbow, tourmaline also occurs as purple stones. These purple crystals come from the species of tourmaline called elbaite, including the highly valuable Paraiba tourmaline.