A pair of African sapphires, 5.13 carats

Technical details: Type: Ruby Weight: 5.135 carats Dimensions (mm): 9.88x7.74x3.52 (average) Shape: Oval Color: Red Clarity: Eye-clean Transparency: Transparent Hardness: 9.0 Treatment: Glass Filled Origin: Africa Certification: Certificate from Saudi Laboratory (MT) - website (www.mtgl.com.sa) Ruby is a gemstone belonging to the corundum mineral group, known for its distinctive red color ranging from pinkish red to dark red, which is due to the presence of chromium in its composition. Ruby is considered one of the hardest gemstones after diamond. Ruby often forms in metamorphic or igneous rocks rich in aluminum.