The ovals are a classic, traditional shape, and the glass is very smooth. There are two shapes of rectangles, both of which feel more contemporary.  The long rectangles are thinner with smooth glass while the shorter rectangles have a thicker glass that has a beautiful amplification effect.  All of the necklaces shown below are sold without earrings.  

NOTE:  MY INVENTORY CHANGES CONSTANTLY SO SOME OF THESE MAY HAVE SOLD,
AND, I MIGHT HAVE SOME THAT ARE NOT SHOWN HERE.  
Please send me  screenshots of a few that you like and I will get back to you!