Maud La Roux answered Capricorn's lucky stones are Topaz and Garnet. Capricorns also have a life stone, which is Blue Saphire. Capricorn's lucky gemstone It has been alleged that both the stones of Topaz and Garnet have immense powers, available to the Capricorn.Topaz- The "stone of true love". It is said to bring the wearer of topaz jewelry happiness, longevity, good luck and intelligence.The stone can apparently enable communication from other realms in the universe. It can also focus the mind, increase wisdom, prevent mental illness and guard against sudden death. Garnet- The "stone of health and love"Garnet is said to be able to repel negativity, give courage and confidence, and prevent depression.It can increase psychic sensitivity and sexual energy. When the stone is placed underneath a pillow during the night it can apparently ward of evil spirits and prevent nightmares.