Buying gemstone parcels can be an enjoyable and worthwhile investement.  Often, sellers like myself will put the same stones in parcels that they would sell individually.  The advantage to the buyer is clear.  The advantage to the seller is the time and money saved by listing in bulk.  If you find a seller whose stones you enjoy, stick with them.  Often sellers like myself will reserve special and unusual stones for repeat buyers.  And don't be afraid to ask for what you want!  I hand pick my parcels and am happy to take special requests for certain stones, matched pairs, ect.  Many sellers will do the same. Happy bidding!!