• "Kristall" - Report on the tests of the interactive computer diamond marking system (ICDMS)
• "Askor" - Report on the tests of the interactive computer diamond marking system (ICDMS)
• "Alrosa" test report

"Askor" - Report on the tests of the interactive computer diamond marking system (ICDMS)

Objectives

Approbation and Estimation of efficiency of the interactive computer diamond marking system (ICDMS).

Stones having inclusions that make efficient marking complicated and considered non-profitable with the existing visual marking technology and control lots.

Control lots
Stones	Spec	2col	3ct	3pcs	9.07 ct
Stones	Dark	2col	4ct	2 pcs	8.47 ct
Cleavage	Spec	1col	3ct	3 pcs	9.73 ct
Experimental lots
Stones	Spec	2col	3ct	3pcs	9.74 ct
Stones	Dark	2col	4ct	3 pcs	12.41 ct
Cleavage	Spec	1col	3ct	3 pcs	10.04 ct

The selected stones were of comparatively complicated shape (with various degrees of distortion). The inclusions were located both in peripheral and central zones. The "Cleavage" experimental group contained stones suitable for inscribing a large "Cr-57" diamond. The "Spec Stones" and "Dark Stones" groups consisted of stones similar with respect to both shape and inclusion location.

Work procedure

Mikhail Shcherbakov, an "Askor" expert, marked every stone of the experimental group and predicated the results with the help of traditional technology (mass, color group, quality group, linear parameters were determined). Then the prediction of the characteristics was made with the help of ICDMS, based on the expert's marking. The optimal location of diamonds was determined with respect to their cost and considering the risk of possible loss. The marked stones were processed on the cutting production of "Askor" in accordance with the existed technology ("sawing"-"bruting"-"cutting"). In addition to the experimental lot, without the preliminary marking, a diamond of the following characteristics was marked with the help of ICDMS: Dark Stones 2col 4ct 4.78 ct.

1. Control lots
N	Mass	Value $ USA	Shape	Mass	Russian Grading system	GIA	Yield	Price	Value $ USA	Value $ USA	Efficiency
Spec Stones, 2Col , 3ct 1256 = 3pcs ,9.07 ct
1	2.94	3692.64	Cr-57 Cr-57	1.09	5/5 (-5%)	G/VS2	48.3%	3135	3417.15	3991.35	1.08
				0.33	6/3	H/VVS2		1740	574.20
2	2.92	3667.52	Cr-57 F.Prin	1.08	3/5	E/VS1	51.4%	3900	4212.00	4481.78	1.22
				0.42	2/8(-30%)	E/12		658	269.78
3	3.21	4031.76	Cr-57 Cr-57	1.17	6/5	H/VS1	45.5%	3050	3568.50	3820.80	0.95
				0.29	3/5	G/VS2		870	252.30
	9.07	11391.92		4.38			48.3%			12293.93	1.08
Dark Stones, 2Col , 4ct 1303= 2pcs ,8.47 ct
4	4.09	5329.27	Cr-57	1.57	5/6	G/VS2	47.7%	3600	5652.00	6093.56	1.14
			F.Prin	0.38	3/6(-30%)	F/VS2		1162	441.56
5	3.84	5707.14	Cr-57	1.21	4/7	F/SI1	44.7%	3350	5393.50	5606.65	0.98
			F.Prin	0.61	3/8(-30%)	E/I2		609	213.15
	8.47	11036.41		3.91			46.2%	2992		11700.21	1.06
Spec Cleavage, 1Col , 3ct 1054= 3pcs ,9.73 ct
7	3.13	3299.02	Cr-57	1.18	6/4	H/VS1	46.5%	3250	3835.00	3774.35	1.18
			F.Trian	0.14	4/6(-15%)	H/I2		434.75	63.67
8	2.86	3014.44	F.Prin	1.05	5/5(30%)	G/VS1	54.3%	2310	2425.50	4869.77	0.92
			Cr-57	0.27	3/3	G/VS1		1335	360.45
9	3.74	3941.96	F.Prin	1.21	3/7(30%)	F/SI1	44.4%	2100	2541.00	4272.00	0.80
			F.prin	0.34	3/3(30%)	E/VVS2		1806	614.04
	9.73	10255.42		4.19			43.1%			9839.66	0.96
	8pcs 27.27	32683.75		16pcs 12.48			45.8%	2711		33833.8	1.04
2. Experimental lots
N	Mass	Value $ USA	Shape	Mass	Russian Grading system	GIA	Yield	Price	Value $ USA	Value $ USA	Efficiency
Spec Stones, 2Col , 3ct 1256= 3pcs ,9.74 ct
1	3.00	3768.00	Cr-57	1.09	6/4(-5%)	H/VS1	53.7%	3087.5	3365.38	4388.22	1.16
			F.Prim	0.52	4/4(-30%)	G/VS1		1967	1022.84
2	3.03	3806.68	Cr-57	1.14	4/4	F/VS1	49.8%	3800	4332	4861.11	1.28
			Cr-57	0.37	6/5*	H/VS1		1430	529.10
3	3.71	4659.76	Cr-57	1.53	4/6	F/VS2	53.9%	3900	5967	6766	1.45
			Cr-57	0.47	4/6	F/VS2		1700	799
	9.74	12233.74		5.12			52.6%	3128		16015.33	1.31
*- yellow spot
Dark Stones, 2Col, 4ct 1303= 3pcs ,12.41 ct
4	4.31	5615.93	Cr-57	1.75	5/7	G/SI1	53.1%	3210	5617.50	6913.50	1.23
			Cr-57	0.54	5/5	G/VS1		2400	1296.00
5	3.84	5003.52	Cr-57	1.21	7/3	I/VVS2	47.4%	3150	3811.50	4845.45	0.97
			F.6cnr	0.61	6/3(-30%)	H/VVS2		1695	1033.95
6	4.26	5550.78	Cr-57	1.44	3/5	F/VS1	50%	3900	5616.00	7272.00	1.31
			Cr-57	0.69	5/5	G/VS1		2400	1656.00
	12.41	16170.23		6.24			50.3%			19030.95	1.18
Dark Stones, 2Col, 4ct 4.78 ct.
7	4.78	6228.34	Cr-57	2.26	5/5(-5%)	G/VS1	53.6%	4750	10735.00	11008.00	1.76
			Cr-57	0.30	5/5	H/SI2		510	273.00
Spec Cleavage, 1Col , 3ct 1054= 3pcs ,10.04 ct
8	3.12	3288.48	Cr-57	1.26	4/7	F/SI1	46.5%	2850	3591.00	3774.35	1.15
			F.7cnr	0.19	2/3(-20%)	E/VVS2		965	183.35
9	3.22	3393.88	Cr-57	1.28	5/6	G/VS2	54.3%	3000	3840.00	4869.77	1.43
			F.Trap	0.47	3/2(-30%)	F/VVS1		2191	1029.77
10	3.70	3899.80	Cr-57	1.12	5/7	G/SI1	44.4%	2700	3024.00	4272.00	1.10
			Cr-57	0.52	5/5	G/VS1		2400	1248.00
	10.04	10582.16		4.84			50.7%			12916.12	1.22
	10pcs 36.97 ct	45214.17		20pcs 18.76 ct			50.7%	3143		58970.4	1.3

These tables demonstrate:

1. The output is approximately 5% higher in all the experimental groups compared to the corresponding control groups.
2. The efficiency ratio of the processing has increased by 10%.
3. For brilliants that were cut from groups of "Spec Stones" and "Dark Stones" the improvement clarity of polished diamonds (on the average on 1 position) was received, that is shown in a trace to the table.

Experimental		Test
Big Diamond	Small Diamond	Big Diamond	Small Diamond
Spec stones
4.67	5.00	5.00	5.33
Dark stones
5.00	5.25	6.50	7.00

More correct and precise efficiency coefficients values could be obtained from the table below.

* There were no prognoses on diamond color and the result after cutting was used in diamond valuation.

N	The diamond parameters were chosen according to "Askor" factory requirements			The prognoses was tested by PaCor system			The diamond parameters were chosen according to PaCor system   requirements			Diamond parameters after cutting according to PaCor recommendations
	Quality	Mass	Price	Quality	Mass	Price	Quality	Mass	Price	Quality	Mass	Price
Spec Stones, 2Col, 3ct 1256= 3pcs ,9.74 ct N Mass Cost 1 3.00 3768 2 3.03 3806 3 3.71 4660 12234
1	6/6	1,00	2750	6/6	1,06	2915	6/4	1,01	3282	6/4	1,09	3365
	4/2	0,30	759	4/2	0,31	784	4/2(15%)	0.48	1187	4/4(30%)	0,52	1023
2	4/4	1,00	3800	4/4	1	3800	4/4	1,02	3876	4/4	1,14	4332
	6/5	0,35	501	6/5	0,35	501	6/5	0,38	543	6/5	0,37	529
3	4/6	1,50	5850	4/6	1,46	4818	4/6	1,54	6006	4/6	1,53	5967
	4/4	0,43	1097	4/4	0,42	1071	4/4	0,42	1071	4/6	0,47	799
Total Cost			14757,00			13889			15965			16015
Efficiency			1,206			1,135			1,305			1,309
Dark Stones, 2Col, 4ct 1303= 3pcs ,12.41 ct N Mass Cost 4 4.31 5616 5 3.84 5004 6 4.26 5551 16171
4	5/7	1,60	5040	5/7	1,60	5040	5/7	1,67	5261	5/7	1,75	5618
	5/7a	0,53	848	5/7	0,53	1039	5/3	0,51	1403	5/5	0,54	1296
5	7/6	1,38	3588	7/6	1,4	3640	7/2	1,27	4128	7/3	1,21	3812
	6/2	0,30	567	6/2	0,41	890	6/2	0.58	1462	6/3	0,61	1034
6	3/4	1,50	7725	3/7a	1,5	4650	3/4	1,5	7725	3/5	1,44	5616
	5/5	0,64	1536	5/5	0,67	1608	5/5	0,68	1632	5/5	0,68	1656
Total Cost			19304,00			16867			21611			19032
Efficiency			1,194			1,043			1,336			1,177
Dark Stones, 2Col, 4ct 4.78 ct. N Mass Cost 7 4.78 6228 6228
7							5/4	2,08	11232	5/5(5%)	2,26	10735
							5/4	0,3	570	6/7a	0,3	273
Total Cost									11802			11008
Efficiency									1,894			1,768
Spec Cleavage, 1Col, 3ct 1054= 3pcs ,10.04 ct N Mass Cost 8 3.12 3288 9 3.22 3394 10 3.70 3900 10582
8	4/7	1,00	2850	4/7	1,00	2850	4/7	1,11	3164	4/7	1,26	3591
	2/4	Flat F.	183	2/4	Flat F.	183	2/4	Flat F.	183	2/3(20%)	0,19	183
9	5/6	1,00	3000	5/6	1	3000	5/6	1,19	3570	5/6	1,28	3840
	3/2(30%	0,30	876	3/2(30%)	0,30	876	3/2(30%)	0,55	1359	3/2(30%)	0,47	1030
10	5/7	1,00	2700	5/7	1,00	2700	5/5	1,06	3498	5/7	1,12	3024
	5/5	0,80	2016	5/5	0,80	2016	5/5	0,53	1276	5/5	0,52	1248
Total Cost			11625,00			11625			13050			12916
Efficiency			1,099			1,099			1,233			1,221

Due to imperfection of the "Askor" equipment and resulting mistakes in the phases of sawing and stripping, the clarity group and mass characteristics of the diamonds deteriorated, which resulted in diminishing of efficiency ratio on the following stones:

1. There were mistakes during sawing diamonds # 1 and # 6;
2. During cutting of ## 3,4,9 - the defects were not cut off;
3. In diamond # 7 - the defects were not cut off because of incorrect bruting.