1st  Decade : The construction of business foundation - started from selling gems and building the gems trading centre

to become a centre for selling gems and jewellery products for the company.

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2nd Decade : The construction of jewellery business foundation - Ampun started to become a stakeholder in the jewellery business by cooperating with foreign designers.

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3rd Decade : Searching for its own supply of materials - Ampun collaborated with businessmen in Thailand to open a gemstones mine in Kanchanaburi Province. At the time of the opening, this mine(S.A.P. Mining) was the prototype mine and become the biggest mine in South East Asia.

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4th Decade : The Construction of Mass Production - Ampun decided to expand its production bases for quality gems and jewelry products that meet economies of scale which brought about the appropriateness of the production cost and product quality.