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Oxygen Standard : Test reports


	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	Effici- ency
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
1	2.94	3692.64	Cr-57 Cr-57	0.33	6/3	H/VVS2	48.3%	1740	574.20	3991.35	1.08
2	2.92	3667.52	Cr-57 F.Prin	1.08	3/5	E/VS1	51.4%	3900	4212.00	4481.78	1.22
2	2.92	3667.52	Cr-57 F.Prin	0.42	2/8(-30%)	E/12	51.4%	658	269.78	4481.78	1.22
3	3.21	4031.76	Cr-57 Cr-57	1.17	6/5	H/VS1	45.5%	3050	3568.50	3820.80	0.95
3	3.21	4031.76	Cr-57 Cr-57	0.29	3/5	G/VS2	45.5%	870	252.30	3820.80	0.95
	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
4	4.09	5329.27	F.Prin	0.38	3/6(-30%)	F/VS2	47.7%	1162	441.56	6093.56	1.14
5	3.84	5707.14	Cr-57	1.21	4/7	F/SI1	44.7%	3350	5393.50	5606.65	0.98
5	3.84	5707.14	F.Prin	0.61	3/8(-30%)	E/I2	44.7%	609	213.15	5606.65	0.98
	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
7	3.13	3299.02	F.Trian	0.14	4/6(-15%)	H/I2	46.5%	434.75	63.67	3774.35	1.18
8	2.86	3014.44	F.Prin	1.05	5/5(30%)	G/VS1	54.3%	2310	2425.50	4869.77	0.92
8	2.86	3014.44	Cr-57	0.27	3/3	G/VS1	54.3%	1335	360.45	4869.77	0.92
9	3.74	3941.96	F.Prin	1.21	3/7(30%)	F/SI1	44.4%	2100	2541.00	4272.00	0.80
9	3.74	3941.96	F.prin	0.34	3/3(30%)	E/VVS2	44.4%	1806	614.04	4272.00	0.80
	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.
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
1	3.00	3768.00	F.Prim	0.52	4/4(-30%)	G/VS1	53.7%	1967	1022.84	4388.22	1.16
2	3.03	3806.68	Cr-57	1.14	4/4	F/VS1	49.8%	3800	4332	4861.11	1.28
2	3.03	3806.68	Cr-57	0.37	6/5*	H/VS1	49.8%	1430	529.10	4861.11	1.28
3	3.71	4659.76	Cr-57	1.53	4/6	F/VS2	53.9%	3900	5967	6766	1.45
3	3.71	4659.76	Cr-57	0.47	4/6	F/VS2	53.9%	1700	799	6766	1.45
	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
4	4.31	5615.93	Cr-57	0.54	5/5	G/VS1	53.1%	2400	1296.00	6913.50	1.23
5	3.84	5003.52	Cr-57	1.21	7/3	I/VVS2	47.4%	3150	3811.50	4845.45	0.97
5	3.84	5003.52	F.6cnr	0.61	6/3(-30%)	H/VVS2	47.4%	1695	1033.95	4845.45	0.97
6	4.26	5550.78	Cr-57	1.44	3/5	F/VS1	50%	3900	5616.00	7272.00	1.31
6	4.26	5550.78	Cr-57	0.69	5/5	G/VS1	50%	2400	1656.00	7272.00	1.31
	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
7	4.78	6228.34	Cr-57	0.30	5/5	H/SI2	53.6%	510	273.00	11008.00	1.76
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
8	3.12	3288.48	F.7cnr	0.19	2/3(-20%)	E/VVS2	46.5%	965	183.35	3774.35	1.15
9	3.22	3393.88	Cr-57	1.28	5/6	G/VS2	54.3%	3000	3840.00	4869.77	1.43
9	3.22	3393.88	F.Trap	0.47	3/2(-30%)	F/VVS1	54.3%	2191	1029.77	4869.77	1.43
10	3.70	3899.80	Cr-57	1.12	5/7	G/SI1	44.4%	2700	3024.00	4272.00	1.10
10	3.70	3899.80	Cr-57	0.52	5/5	G/VS1	44.4%	2400	1248.00	4272.00	1.10
	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:

The output is approximately 5% higher in all the experimental groups compared to the corresponding control groups.
The efficiency ratio of the processing has increased by 10%.
For diamonds 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.

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

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

4/4

1,00

3800

4/4

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

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

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

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

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

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

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

5/6

1,00

3000

5/6

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

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

1,233

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:

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

Head of division of "OctoNus" company	Main technologist of "Askor" factory
S.B.Sivovolenko	M.O.Sherbakov