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.
Topaz is one of the most common gemstones worldwide. It has a very good hardness of 8 on the Mohs scale. Topaz comes in a rainbow of colors, the most valuable of which are the red, pink and orange stones which are mined in Brazil, Pakistan and Russia.