LIGHT SIAM. THE CANCER BIRTHSTONE COLOR REPRESENTS COURAGE, GOOD LUCK, AND GOOD FRIENDSHIP. Those born in July, or under the star sign of the crab, have this beautiful shade of red as their birthstone color. Cancerians are known for their loyalty, empathy, intuition and tenacity, but they can be sensitive and emotional; so it is fortunate that as well as symbolizing passion, Light Siam safeguards their most tender emotions, just like the strong shell of the crab. Significantly, ravishing Light Siam encourages Cancerians to enjoy being themselves, safe in the knowledge that it offers protection.