CLEAN: Christie's auctions Rothschild jewellery

The video discusses the Jewels of Canada Rothschild, highlighting their historical significance and rarity. The jewels include a pearl and diamond tiara, bracelet, and brooch, with estimated values ranging from £1,000,000 to £1,500,000 for the tiara and £300,000 to £400,000 for the brooch and bracelet. The video also contains unrelated remarks and background noise.

How rare are natural pearls of the size mentioned in the text?

What is the estimated value range of the tiara mentioned in the text?