Katie Cassidy, Her Jewels, Harry Kotlar Diamonds. This star wore Harry Kotlar D flawless diamond cluster earrings worth $1 million at 87th Annual Academy Awards. Harry Kotlar is recognized as the premier source for the highest quality diamonds, its hallmark design � Artisan Pave and �the world�s most brilliant Cushion Cut diamond� � Kotlar Cushion. Spanning six decades of beauty, art and perfection, Harry Kotlar�s designs evoke old-world artistry with modern sophistication, creating stunning diamond rings, bands, earrings, bracelets and necklaces that celebrate individuals� story eternally.