The garnet is a complicated and lesser known gemstone. There is a Family of Garnets (seven major classifications) and they are all very hard glassy silicates. They contain a variety of metals and have a wide colour range from black to colourless. Some rare forms of Garnet are more valuable than diamonds. br br Garnet - crystal structure rhombic br Deep red - orange - yellow - purple br Green and colourless - brown and black. br Green for nature - red for power br Black for death and mauve for grieving br Worn for protection from the plague br Gem exchanged when friends are leaving br Rhombic structure crystal - Garnet br br Garnet January's birthstone br Capricorn her birth sign twin br Found in North and South America br Guards from poison plague and sin. br Greeks all wore them to keep bright br Romans wore them with engraving br To protect them through the night. br Birthstone January's Garnet. br br Seven major forms for Garnet br Deep red Pyrope precious necklace br Graced the necks of rich Victorians br Rhodolite is deep rich purple br The purest green is Demantido br The Garnet has a secret power br It really peps up one's libido! ! ! br Garnet for forms - major seven. br br Versatile is gemstone Garnet br Garnet crystal structure rhombic br Garnet January's birthstone br Seven major forms for Garnet. br Garnet for forms - major seven br Birthstone January's Garnet br Rhombic structure crystal Garnet br Garnet gemstone is versatile.