Possible Clues:

• Sort of note on satellites by Collins
• Gem in a Wilkie Collins novel
• Shade of satellite offered by Collins
• Satellite direction provides pitch that's a gem
• Majority will keep working when given one gem
• Gem popular in Art Nouveau jewelry
• Semi-precious jewel
• Gem is colour of a satellite
• The ____, a novel by Wilkie Collins
• Low character pinching bridge player’s jewel