Armenta. Green Turquoise & Black Diamond Ring. Emily Armenta sets a glowing quartz-veiled turquoise dome off against black and white diamonds, making this ring a must-have bauble to add regal opulence your flowing evening gowns. From the Midnight Collection. 18-karat yellow gold rope frames round-cut green turquoise with faceted quartz dome overlay. Four Cravelli cross prongs and pave white quartz settings; framed with pave black diamonds. Thin oxidized sterling silver band with diamonds set in silver bezels and in 18-karat yellow gold quatrefoils. 0.59 total diamond carat weight.