There is a lot of confusion between zircons, a mined mineral, and cubic zirconia, an inexpensive synthetic crystal. But jewelry designers know the difference. The ranks of independent designers who ...
Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...
Evidence of Earth's first continents — 4.3-billion-year-old "diamonds" — are actually just fragments of polishing grit, a new study finds. In 2007, an international team first reported discovering the ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback