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| Price | Negotiate |
| MOQ | Negotiate |
| Delivery Time | 1-7 Working Days Depends On Quantity |
| Brand | YUDA CRYSTAL |
| Place of Origin | Zhengzhou, China |
| Certification | None |
| Model Number | YD-A+ |
| Packaging Details | Carton box |
| Payment Terms | 100% Payment In Advance |
| Supply Ability | 50000carats per month |
| Shape | Round Brilliant Cut | Customization | Welcome |
| Packaging Details | Carton box | Supply Ability | 50000carats per month |
| Place Of Origin | Zhengzhou, China | Technology | HPHT |
| Minimum Order Quantity | Negotiate | Component | Carbon |
| Courier | DHL, FedEx, UPS, TNT, EMS etc | Enhancement | None |
| Payment Mode | T/T, Bank Transfer, PayPal, Western Union | Symmetry | Excellent, VeryGood, Good |
| Usage | For Making Lab Diamonds Jewelry(Rings, Earring, Necklace etc ) | Place of Origin | Zhengzhou, China |
| Cut | Ideal, Excellent, VeryGood, Good | Polish | Excellent, VeryGood, Good |
| Available Type | HPHT | Product Name | Lab Grown Melee Diamonds |
| Color | FG | Grade | High |
| Treatments Applied | None | Model Number | YD-A+ |
| Hardness | Moh's 10 Scale | Sample Order | Welcome |
| Clarity | VVS VS | Certification | None |
| Brand Name | YUDA CRYSTAL | Payment Terms | 100% Payment In Advance |
| Brand | Yuda Crystal | Assortment | Good |
| Price | Negotiate | Delivery Time | 1-7 Working Days Depends On Quantity |
| Packaging | As Export Standard | Carat Weight | 0.005-0.03ct |
FG VS VVS 0.005ct - 0.03ct Per Pcs HPHT Melee Diamonds For Diamond Jewellery
HPHT Melee Diamonds Description
Nowadays
people
can
use
advanced
technology
to
simulate
the
formation
conditions
of
natural
diamonds
under
the
earth's
crust
to
create
lab
grown
diamonds.
This
formation
process
is
the
main
factor
that
distinguishes
lab-created
diamonds
from
mined
diamonds.
The
chemical,
optical
and
physical
properties
and
crystal
structure
of
lab
grown
rough
diamonds
are
basically
the
same
as
natural
diamonds.
Although
the
place
and
conditions
of
formation
are
different,
the
essence
is
the
same.
Lab
grown
diamonds
is
usually
produced
by
chemical
vapor
deposition
(CVD)
or
high
pressure
high
temperature
(HPHT)
methods.
1. High pressure and high temperature (HPHT)
The
laboratory
simulates
the
high
temperature
and
pressure
conditions
of
natural
diamonds
when
they
are
formed
underground.
HPHT
diamonds
are
manufactured
at
a
pressure
of
5-6
GPA
and
a
temperature
of
1300-1600°C.
Low-quality
natural
diamonds
and
unprocessed
natural
diamonds
can
be
processed
through
the
HPHT
process
to
improve
color
and
clarity.
In
addition
to
increasing
the
color
grade
of
colorless
diamonds.
2.
Chemical
Vapor
Deposition
(CVD)
Scientists
are
able
to
manufacture
synthetic
diamonds
at
moderate
temperatures
(700°C
to
1300°C)
and
low
pressures
by
using
CVD
technology.
The
carbon-containing
gas
is
pumped
into
the
vacuum
chamber,
deposited
on
the
diamond
seed,
and
crystallized
into
rough
laboratory-grown
diamonds.
The
final
size
of
the
diamond
depends
on
the
time
allowed
to
grow.
Can
we
distinguish
between
laboratory
grown
diamonds
and
natural
diamonds?
Yes
it
is.
However,
only
diamond
professionals
can
identify
the
difference
between
laboratory
grown
diamonds
and
natural
diamonds
by
using
professional
diamond
identification
equipment.
Parameters of HPHT CVD Melee Diamonds
| Lab Grown Melee Diamonds Details | |
| Brand Name | Yuda Crystal |
| Name | Lab Grown Melee Diamonds |
| Diamond Color | FG |
| Diamond Clarity | VVS-VS |
| Diamond Carat Weight | 0.005-0.03 carat |
| Diamond Cut | Excellent, Very Good,Good |
| Polish | Excellent, Very Good,Good |
| Symmetry | Excellent, Very Good,Good |
| Technology | HPHT |
| Size | 1mm - 2mm |
| Shape | Round |
| Diamond Enhancement | None |
| Available Type | HPHT |
| Diamond Certificate | None |
| Application | Jewelry Decorations Rings Earring Necklace |
| Place Of Origin | Zhengzhou, China |
| Delivery Time | 1 - 7 Working Days Base on Order Quantity |
| Payment Terms | 100% Payment In Advance |
| Payment Methods | T/T, PayPal, Western Union, Bank Transfer |
| Shipping way | DHL, FedEx, SF Express, UPS, EMS, TNT etc |
| M.O.Q | Negotiable |
| Diamond Type | Synthetic(lab created) |
| Location | Zhengzhou, China |
| Treatments Applied | None |
| Fire Dispersion | 0.044(Same as Natural Diamond) |
| Brilliance Refraction Index | 2.42(Same as Natural Diamond) |
| Relative Density | 3.52(Same as Natural Diamond) |
| Chemical Composition | Carbon(Same as Natural Diamond) |
| Moh's Hardness | 10(Same as Natural Diamond) |
HPHT CVD Melee Diamonds Introduction
Natural diamonds are created by nature and are the result of high temperature and pressure formed over billions of years. The Rough Lab Grown Diamonds are produced in the laboratory, usually in a few weeks. The chemical difference between the two is same.
So how do you distinguish between Rough Lab Grown Diamonds and natural diamonds?
There is no obvious difference between the Rough Lab Grown Diamonds and natural diamonds. Even professional gemologists need special equipment to identify them. By zooming in, professionals will be able to discern subtle contrasts in diamond inclusions grown and mined in the laboratory.
| The Difference Between Lab Diamond And Natural Diamond | ||
| Properties | Earth Mined | Lab Created |
| Guaranteed Conflict-Free | No | Yes |
| Hardness (MOHS) | 10 | 10 |
| SP3 Carbon Diamond Bonds (%) | 100% | 100% |
| Internal Crystal Structure | Face-Centered Cubic | Face-Centered Cubic |
| Hardness Comparable | 2.42 | 2.42 |
| Relative Diversity | 3.52 | 3.52 |
| Color Diffusion | 0.044 | 0.044 |
| Color | Various Grades | K to D grades |
| Price | $$$$$ | $$$ |
HPHT CVD Melee Diamonds Details
