Two suspension points instead of one means the pendant can't rotate freely. The face stays forward during wear rather than ending up sideways or backward by the end of the day. That's the double bail's one job, and it does it well.
Elemental Detail
Higher pure gold content defines the difference: 18kt white gold at 75% pure gold versus 14kt at 58.3% produces a denser, more richly composed alloy whose greater precious metal proportion is reflected in both the physical character of the piece and its intrinsic material value.
Myth & Meaning
What's notable about the butterfly's symbolic meaning is its consistent theme around transformation, rebirth, and the transient beauty of life. There's something so special about different cultures looking at the same creature and reaching the same conclusions, which is a testament to how clearly the butterfly communicates its own nature.