The merger of two china clay businesses in Cornwall in 2012 has been referred to the Competition Commission.
BBC: China clay pit
China clay - also known as kaolin - is used in the manufacture of sanitary ware, paper and paints.
More than 60 jobs are to be axed at a china clay business, with compulsory redundancies not ruled out.
BBC: Imerys china clay in Cornwall announces job losses
The attraction, which was built in a 160-year-old china clay quarry, will formally start consulting on the redundancies on Wednesday.
BBC: Cornwall's Eden Project to axe up to 70 jobs
The china clay industry in Cornwall was started nearly 300 years ago by English China Clays, which was taken over by Imerys in 1999.
The new centre will stand alongside the Eden Project's plant-filled biomes - large greenhouse domes, on the site of a former china clay pit near St Austell.
BBC: NEWS | UK | England | Cornwall | Eden's ?12m education plans
China and Japan have shown an interest in using the centre in the coming months and Ms Clay is confident more will follow.
BBC: London 2012 National Watersports Centre boost hopes
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