The name Golden Green Tourmaline feels awkward at first, as if it were a two-tone gemstone, but that's not the case. Golden Green Tourmaline is actually a yellow gemstone.
Green Tourmaline is a general term for a type of gemstone. Among the Green Tourmaline family, the most famous is the Emerald, one of the Five Great Gemstones, followed by Aquamarine.
Golden Green Tourmaline is far less famous than these two, so its price is naturally much cheaper.
Li Xiu is interested in the Golden Gate, partly because it's relatively close, but also because the gemstones used to open it are cheaper.
To open a Trial Gate requires dozens of rubies, sapphires, and the like. Li Xiu can't afford that. Even if there's a gate there, he doesn't have the money to open it daily.
Of course, another important reason is that the wealthy magnate in Guyue City doesn't highly value the Golden Gate. Perhaps he could acquire it for the City of Light at a low cost.
