By Gail Gruber Siegel Some of us have always worn diamonds during the day; and we're not about to stop -- even if we're wearing them with hoodies and yoga pants. "Jewelry is to be enjoyed, and not locked away," says designer Temple St. Clair, 46, who wears her own diamond necklace with tees and jeans. "I've seen a huge increase in the number of women buying jewelry for themselves, and they tell me they like the bigger, bolder pieces. Well our forties and fifties are a very confident time. We want what we want." Amen to that. In this jewelry feature called "Diamonds Du Jour" Alex Woo's Sienna cuff is featured alongside other designer pieces featuring diamonds.