Nikos Koulis, bracelet with 0.32 cts emeralds and 0.3 cts opal
Nikos Koulis, black gold and 1.65 cts black diamonds Medusa earrings with one ruby and one white diamond tirangle
Nikos Koulis Spectrum, yellow gold earrings with 0.1 cts brown diamonds and 1.86 cts tsavorites
Nikos Koulis Spectrum, yellow gold earrings with 0.38 cts brown diamonds, 0.59 cts tsavorites, 0.84 cts yellow beryl, 0.48 cts iolite, 0.35 cts rhodolite and 0.44 cts pink tourmaline
Nikos Koulis Spectrum, black gold, 0.83 cts tsavorite and 0.04 cts brown diamonds pendant
Nikos Koulis Spectrum, yellow gold ring with 0.24 cts brown diamonds, 0.74 cts tsavorites, 0.43 cts yellow beryl, 0.38 cts iolite, 0.18 cts rhodolite and 0.46 cts pink tourmaline
Nikos Koulis, black gold, 2.89 cts tsavorite and 0.92 cts brown diamonds ring
Nikos Koulis, bracelet with 0.45 cts turquoises and 0.1 cts diamonds