These designs are great! It's my first entry and I'm passing the word to whomever I speak with!
#3 and #4 are the top entries as they capture the gold and diamond aspects of the business. Can the "LLC" be added in a smaller font?
#3 - the diamond needs to reflect a diamond as they have flat tops - see
http://www.fotosearch.com/CSP148/k1481297/. LOVE the shadow!
#6 and #7 - I like the simplicity but don't feel it reflects purchasers and sellers of diamonds, estate jewelry and gold.
#1 I like the NG over the company name but am looking for more elegance in the fonts in the circles.
#9 - can you please bold the "gold," remove the comma and add some characteristic that reflects diamonds? I like how the NG stands out.
#10 - please make the font size smaller on the LLC. Can this be reworked to reflect diamonds as well?
#5 and #8 - not quite capturing what we do as a business but very nicely designed.