Karda's 3.5ct Emerald Cut CZ Halo Engagement Ring This 3.5ct Emerald Cut CZ Halo Engagement Ring offers a chic radiance and brilliance that any bride-to-be will love! The .925 sterling silver ring features a bold Emerald Cut 3.5-carat CZ center stone surrounded by a halo of small round cut CZs. If you want to look like you spent thousands on your engagement ring without spending that much, go for this affordable ring!