What's A Diamond Girl? A Diamond Girl is a woman applying pressure she sprinkles glitter and leaves a mark everywhere she goes!! What started as a small self-owned local business has grown to be one of South Carolina's biggest and trendiest boutiques. Red Diamond Boutique resides in the heart of Sumter. The CEO Kayla Walker was born and raised in Pinewood South Carolina. One day she took a leap of faith and started her own business independently. The Red Diamond Boutique delivers every girls fashion needs and wants at an affordable price. Become a diamond girl and shine forever!! 3