Original sentence: As of 5 April 2014, prices for small samples (up to 100 g) of silicon, antimony and tellurium, and graphite, aluminium and selenium, average around one third the cost of silver (US$1.5 per gram or about $45 an ounce).Prices for the applicable elements traded as commodities tend to range from two to three times cheaper than the sample price (Ge), to nearly three thousand times cheaper (As).The recognised metalloids and their closer neighbours mostly cost less than silver; only polonium and astatine are more expensive than gold
Edited sentence: As of 5 April 2014, prices for small samples (up to 100 g) of metalloids lie to either side of the price of silver.Prices for metalloids traded as commodities tend to range from two to three times cheaper than the sample price (Ge), to nearly three thousand times cheaper (As).Silicon, antimony and tellurium, and graphite, aluminium and selenium, average around one third the cost of silver (US$1.5 per gram or about $45 an ounce)