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Grading Lab Survey Introduction Method of Survey Results - Clarity and Color - Cut Grades - Clarity Plots - Laser Inscription - Girdle Thickness - Measurements - Pricing  - Price Differences Discussion - Brand Value - Appraisal Conclusion Acknowledgements Appendix I Appendix II Appendix III Appendix IV Appendix V Diamond Tutorial		Acknowledgements   We wish to acknowledge the help and assistance provided by DirtCheapDiamonds.com EngagementRingsDirect.com and Whiteflash.com whose valuable merchandise was unavailable for sale for a considerable period, and for the administrative work involved in shipping and collating information. Without their help and involvement we could not have performed this survey.   We are also grateful to Mr. P. Yantzer, the Director of AGSL, Mr. B. Boyajian, the President of GIA, and Mr. M. Gershburg, the Director of EGL USA, for their help in verifying the data presented in this article and constructive criticism. discuss   « Conclusion   |   Appendix I »

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