DIAMOND ROUGH
Diamond Rough
MPCVD single-crystal rough, led by standard rectangular forms, with custom formats up to 35×35×12 mm.
STANDARD SIZES
Standard Sizes
Rectangular rough makes up 90% — three standard sizes in high volume; custom large formats reach 35×35×12 mm.
20×15×9.5mm
Standard
21×17×9.7mm
Standard
24×18×10mm
Standard
30×30×15mm
Custom
35×35×12mm
Custom · largest at grade
SPECIFICATIONS
Specifications
| Parameter | Value |
|---|---|
| Growth method | MPCVD single-crystal growth |
| Main form | Rectangular (90%) |
| Standard size ① | 20 × 15 × 9.5 mm |
| Standard size ② | 21 × 17 × 9.7 mm |
| Standard size ③ | 24 × 18 × 10 mm |
| Custom sizes | 30×30×15 / 35×35×12 mmLargest formats delivered at equal grade (D-E / VVS-VS / Type IIa) |
| Color | D/E |
| Clarity | VVS/VS |
| Polished target | 10 / 15 / 25 ct |
| Supply status | Demand exceeds supply; 10× expansion needed |
| Price | Quoted per spec & quantity |
| MOQ | Negotiated per order |
APPLICATIONS
Applications
- Cutting & polishing houses
- Downstream jewelry brands
- Overseas diamond dealers
- International diamond trading centers
ROUGH GALLERY
Rough Gallery
Single-stone weighing, batch arrays, and processing measurements — real production records.
IGI CERTIFIED
IGI Grading Certificates
Every polished stone can be certified by IGI or other leading labs, with full traceability.
Weight
10.80 ct
Color
D
Clarity
VVS2
Cut
Step Cut
Fluorescence
None
Type
Type IIa
Report No.
LG756504660
Growth method
CVD
SUPPLY CAPABILITY
In-house systems, in-house material: the process window is ours to adjust
ENTASK is both an MPCVD system manufacturer and a diamond material producer. The microwave power source (in-house E-MG010K, 2450 MHz, 10 kW / 15 kW), chamber, intelligent controls and growth process are all developed in-house: 10 kW supports uniform growth across a 92mm area with 12mm crystal height, while 15 kW reaches a 120mm growth area. Equipment and process iterate under one roof.
That yields two practical advantages. First, process parameters can be tuned per order, supporting custom non-standard sizes (rough at 30×30×15 / 35×35×12 mm — the largest formats ENTASK has delivered at equal grade: D-E colour, VVS-VS clarity, Type IIa). Second, system reliability directly determines delivery consistency: our in-house microwave source has an MTBF over 10,000 hours and runs 1,500+ hours at full load trouble-free.
ENTASK is ISO 9001:2015 certified, output can be graded by IGI and other leading laboratories, and we supply customers in mainland China as well as India, the Middle East, Europe and the United States.
- Largest custom format
- 35×35×12 mm
- Record output per run
- 856 ct
- Color / Clarity
- D–E / VVS–VS
- Type
- Type IIa single-crystal