Is Sri Lanaka taking the real advantage of natural resources

Sri lanka is a country enrich with lots of natural resources. So what these people do with resources. Just nothing. We have clay without converting into goods we export. we have stones which can be used to make expensive granite, but we just export them and import the granite paying bigger amount. We have the world best silica ... what we do... just export..
.. those are just a small portion of the list Sri Lankan's do.

So in a country, this happens .. can they become a developed nation .. only in dreams.