No, to get leaf stones trade green shards with a man that lives on the sea
in celadon market you can buy leaf stones,fire stones,water stones and thunder stones
You can't buy the evolution stones in Emerald, but if you find some shards in Underwater regions, like Green Shard, you will be able to trade them for stones of same color (Green = Leaf for example), in Hunter's House located on the way of Mossdeep from Lilycove.
You can't buy leaf stones in emerald to obtain a leaf stone find a green shard and trade it to the hunter found on the route west of mossdeep city he will trade you a leaf stone for the shard.
you cannot buy water stones you can get them with the hunter he lives in a house in the sea
You cannot buy leaf stones you have to earn them from people like lennora the second gym leader or find them in poke balls.
In Pokémon AshGray, you can obtain a Leaf Stone by visiting the Celadon Department Store. Specifically, go to the roof of the store, where you can buy various evolutionary stones, including the Leaf Stone. Additionally, you might find Leaf Stones in certain locations or as hidden items throughout the game. Make sure to explore thoroughly to find all possible stones!
nowhere, find a green shard and bring it to the shard hunter near mossdeep city... he will trade it for a leaf stone
Yes, you can buy a Leaf Stone in Pokémon SoulSilver. It is available for purchase at the Celadon Department Store in the city of Celadon. You can find it in the store's rooftop sale area, where various evolutionary stones are sold.
You cannot buy stones. You have to trade them. You have to have an ancient shard and go to a house on an island off of..... I don't remember where.... its either off of Dewford, Slateport, or just some place you can use SURF.... sorry that's all I know.
The way I got a fire stone on emerald was by going into the fiery cave (path either one) then using strength on a couple of rocks but you have to go downwards and there you will see a pokeball, pick it up then use it on a Pokemon that can evovle by a fire stone(I used it on my VULPIX and if you go up you will find anover pokeball but I have forgoten what is inside it).
If by duy you mean buy then the answer is you can't. The only Pokemon games where you can buy evolutionary stones are Pokemon Green, Blue and Yellow (that's right, the originals).
Go to black city and gain people from pokemon white's white forest who gives you the option of selling leaf stone. After, save, go to the market that just appeared in your city and buy (expensive) leaf stones.