Shop › Montana Sapphire Trilogy Necklace Image 1 of 1 Montana Sapphire Trilogy Necklace $800.00 Made in 18k yellow gold with an oxidized sterling silver accent. This necklace features a 4mm montana sapphire. Add To Cart Added! Made in 18k yellow gold with an oxidized sterling silver accent. This necklace features a 4mm montana sapphire. You Might Also Like Enzo Necklace- Keum Boo $110.00 Raya Necklace $130.00 Raya Earrings $140.00 Morning Dew Earrings- Keum Boo $120.00 Nightfall Camel's Hump Necklace $300.00