👉 A seamanite is a type of gemstone that has been mined in the Indian Ocean, specifically in Sri Lanka. It is known for its unique appearance and its high value due to its rarity and beauty. Seamanites are typically made from a combination of colored stones such as garnet, diamond, sapphire, and topaz. The coloration can vary widely depending on the specific type of seamanite, but it may include shades of blue, green, yellow, or red.