How many carats is Gwen Stefani's engagement ring? And she revealed what looks like a square diamond ring with two smaller diamonds on either side, set in white gold or platinum. Jewelry experts have estimated the center stone to be a whopping six to eight carats. How much did Blake Shelton spend on Gwen Stefani's engagement ring? It is estimated that the ring is between six to eight carats. Blake is believed to have spent around $500,000 on the gorgeous ring. Is Gwen Stefani wearing an engagement ring? Get a better glimpse at the singer's new bling. Gwen Stefani's new engagement ring just made its TV debut. The singer, 51, gave fans a glimpse of her new bling on "The Voice" Monday night when the singing competition began its first round of live shows.
Which celebrity has the biggest engagement ring? Elizabeth Taylor. Maybe the most famous (but definitely the biggest) celebrity engagement ring ever, Elizabeth Taylor's square diamond ring was 33.1 carats and worth reportedly $11.4 million at the time.
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