Most birthstone guides are marketing copy. They repeat the same list every jeweller copies from every other jeweller, and almost none of them tell you which stones actually wear well every day.
Diamond, sapphire and ruby are the three that wear best — they are the hardest gems and resist scratching. They are also the three that hold their value longest, which is why we steer engagement-ring clients toward them when the brief is "wear it forever".
Emerald and opal are softer. They scratch, they chip, they abrade. We still love them — but we set them in protective bezels and we tell every client, in writing, that they will need re-polishing every few years. That is not a flaw; that is the cost of wearing something alive.
For month-by-month stones that hold up to daily wear: January garnet, February amethyst, March aquamarine, April diamond, May emerald (with care), June pearl or alexandrite, July ruby, August peridot or spinel, September sapphire, October tourmaline or opal (with care), November topaz or citrine, December turquoise or tanzanite.
