Possible Clues:

• Gem on a strand
• Count pence up - there's a piece of wisdom
• Small treasure
• Altogether worthwhile and noble at last from Shelley, perhaps
• Tone similar to eggshell
• Paler model is a bit of a gem
• "The Good Earth" novelist Buck
• Quiet noble paragon
• Emerald : May :: ___ : June
• Gem made in an oyster