Simplicity is often the best answer.  This simple amethyst and diamond necklace is lovely.  A center diamond bar V shape hold a 2.7 carat lavender amethyst embellished by fourteen brilliant-cut accent diamonds.  This gold vintage necklace is created in 14kt yellow gold.

Gemstones: One light to medium purple amethyst measuring appx 2.74 carats, 9.54 x 9.21 x 5.88mm
Fourteen brilliant-cut diamonds measuring appx 0.30 carat total weight
Measures: 17.5", Center V shape measures 3/8"
Hallmarks: 14KT
Weight: 8.7 Grams
Circa: Contemporary Estate Jewelry