GM Collin Diamond Serum is an anti-aging serum that visibly reduces the signs of aging while improving the skin’s texture and radiance. This serum works to reinforce the skin’s natural moisture barrier for long-lasting hydration. It protects the skin against environmental stressors G.M. Collin Diamond Serum is suitable for all skin types and conditions. It has a velvety smooth texture that seems to melt into the skin and features a subtle fragrance of floral, warm woody notes and a gentle musk.