I really don't know much about the pricing of lab diamonds, but I got an email from sykessler where I registered the warranty of my GemOro ultrasonic. They're launching lab diamonds, and the say their prices are 79-84% off RAP. They all seem to be graded by IGI though. This didn't transer well from an excel file, but the prices listed are the RAP prices.I don't see them on the website yet, but just another source.
PG11B/50-50 395937966 CU 1.02 F VS2 VG 6.8x5.69x3.68 64.67 61.5 $6,200 IGI Avail 360 Video
384962920 384962920 CU 1.06 E VS2 VG 6.9x5.75x3.64 63.3 58.5 $6,600 IGI Avail 360 Video
PG32C-34-34 407950071 OV 1.01 E VS1 EX 7.85x5.81x3.57 61.4 58.5 $7,000 IGI Avail 360 Video
PG15B-134-134 407988049 OV 1.02 E VS2 VG 7.89x5.83x3.62 62.1 58 $6,600 IGI Avail 360 Video
PG15B-133-133 407988048 OV 1.02 E VS2 VG 7.96x5.82x3.52 60.5 57.5 $6,600 IGI Avail 360 Video
PG07A/3-136 395935854 OV 1.03 F VS1 EX 8.5x5.84x3.53 60.45 58.5 $6,500 IGI Avail 360 Video
PG32C-33-33 407942772 OV 1.04 E VS2 EX 8.1x5.78x3.54 61.2 58.5 $6,600 IGI Avail 360 Video
PG13C-11-11 407978741 OV 1.06 E VS1 EX 7.96x5.89x3.68 62.5 59 $7,000 IGI Avail 360 Video
PG14A-19-19 407931448 PS 1.08 E VVS2 VG 9.01x5.75x3.5 60.9 58.5 $7,800 IGI Avail 360 Video
PG23B-38-38 407988134 PS 1.22 E VS1 EX 9.06x5.99x3.75 62.6 58 $7,000 IGI Avail 360 Video
PG32C-70-70 407942767 RD 1.01 D VS2 ID 6.38x6.4x3.99 62.4 55.5 $9,800 IGI Avail 360 Video
PG23C-10-10 407978567 RD 1.01 E VS2 ID 6.51x6.54x3.92 60 57.5 $9,000 IGI Avail 360 Video
PG32C-2-2 407950065 RD 1.01 E VS2 ID 6.39x6.44x3.96 61.7 56 $9,000 IGI Avail 360 Video
PG23A-102-102 407988030 RD 1.01 E VS2 ID 6.37x6.41x3.99 62.4 56 $9,000 IGI Avail 360 Video
PG23B-89-89 407988190 RD 1.01 E VS2 ID 6.51x6.54x3.91 60 58 $9,000 IGI Avail 360 Video
PG32C-16-16 407950067 RD 1.01 D VS2 ID 6.4x6.43x3.99 62.2 54.5 $9,800 IGI Avail 360 Video
PG11B/95-95 395935937 RD 1.01 E VS2 ID 6.39x6.44x3.98 62.2 62.2 $9,000 IGI Avail 360 Video
PG15B-117-117 407978466 RD 1.01 E VS2 ID 6.39x6.44x3.98 62.1 55.5 $9,000 IGI Avail 360 Video
PG15A-65-65 407988099 RD 1.01 E VS2 ID 6.4x6.45x3.93 61.1 57.5 $9,000 IGI Avail 360 Video
PG15A-23-23 407978628 RD 1.01 E VS2 ID 6.37x6.42x3.96 61.9 57 $9,000 IGI Avail 360 Video
PG13C-126-126 407978731 RD 1.01 E VS2 ID 6.37x6.42x3.95 61.8 57.5 $9,000 IGI Avail 360 Video
PG32C-78-78 407942768 RD 1.11 F VS2 ID 6.72x6.74x4.05 60.1 57 $8,300 IGI Avail 360 Video
PG13B-10-10 400913388 RD 1.12 E VS2 ID 6.69x6.75x4.06 60.5 57 $9,000 IGI Avail 360 Video
PG32A-57-57 407950092 RD 1.12 F VS2 ID 6.62x6.67x4.13 62.1 55.5 $8,300 IGI Avail 360 Video
PG23B-90-90 407978501 RD 1.21 E VS2 ID 6.81x6.86x4.21 61.6 56 $9,000 IGI Avail 360 Video
PG32A-73-73 407942815 RD 1.23 D VS2 ID 6.82x6.87x4.23 61.7 57.5 $9,800 IGI Avail 360 Video
PG32B-23-23 407942732 RD 1.30 E VS2 ID 7.05x7.1x4.27 60.4 58 $9,000 IGI Avail 360 Video
PG32A-49-49 407950076 RD 1.30 E VS2 ID 6.99x7.02x4.29 61.2 57.5 $9,000 IGI Avail 360 Video
PG23B-21-21 407988163 RD 1.45 E VS2 ID 7.29x7.35x4.44 60.7 57 $9,000 IGI Avail 360 Video
PG14A-39-39 407931438 RD 1.50 D VS2 ID 7.33x7.38x4.52 61.5 55 $12,800 IGI Avail 360 Video