Blue Sapphire Madagascar PendantPhillips House blue sapphire madagascar pendant in yellow gold. The Bespoke Collection begins with a singular stone. This pendant features a 4. 94 ct cornflower blue, no heat Madagascar Asscher cut sapphire, remarkable for its natural color and exceptional clarity. Cornflower blue sapphires are among the most sought after in the natural world, valued for their soft yet saturated hue and luminous depth. This stone has been left exactly as it formed,