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THE JOURNEY OF A LAB-GROWN DIAMOND
From Seed to Signora
A diamond seed. Carbon transformed. Brilliance revealed. Then a piece made for one person: you. Follow the CVD journey from the growth chamber to our Surat workshop.
This is an educational journey. The exact growth method, treatment disclosure, grading-report scope and materials for your stone are stated on its product page or in your approved custom specification.
- CVD origin explained
- IGI · eligible center/primary diamond 0.50 ct+
- Made to order in Surat
FIRST, THE FACT THAT MATTERS
Lab-grown describes its origin—not its identity.
A laboratory-grown diamond has essentially the same chemical composition, crystal structure, optical properties and physical properties as a natural diamond. The difference is how and where the crystal formed: through a controlled technological process rather than a geological one.
It is not cubic zirconia and it is not moissanite. Those are different materials. A lab-grown diamond is diamond.
The journey below shows how a CVD lab-grown diamond moves from a diamond seed and carbon-containing gas to a rough crystal, a polished stone and finally made-to-order jewelry.
Compare lab-grown and natural diamonds →MaterialCrystallized carbon
Hardness10 on the Mohs scale
Quality languageThe same 4Cs
Origin disclosureProduct-specific documentation
THE COMPLETE JOURNEY
Six transformations. One finished piece.
The early stages belong to specialist diamond technology and cutting. Signora's work begins with selecting the right documented stone for the design, then crafting the jewelry around it. Keeping those roles clear is part of keeping the story honest.
01 · FOUNDATION
The Diamond Seed
CVD growth begins with a thin plate of diamond crystal. This seed provides the ordered lattice on which new diamond material can form. It is the foundation of the crystal—not a lookalike stone and not the finished gem.
- Diamond crystal
- Thin seed plate
- Starting lattice
02 · CVD GROWTH
Carbon Becomes Diamond
The seed is placed in a low-pressure growth chamber. Hydrogen and a carbon-containing gas, commonly methane, are introduced. Microwave energy activates the gas into a plasma, creating the conditions for carbon to deposit on the seed as diamond.
- Low-pressure chamber
- Carbon-containing gas
- Microwave plasma
03 · ROUGH CRYSTAL
Layer by Layer
Carbon builds onto the seed over time, extending the diamond lattice and forming a rough crystal. At this point it is real diamond, but it has not yet been planned, shaped or polished for jewelry.
- Rough crystal
- Unfaceted
- Exact report controls
04 · PLANNING & CUTTING
Brilliance Is Designed
The rough is inspected and mapped before cutting. Its orientation, proportions and intended shape are planned to balance beauty, structural integrity and yield. Precision shaping, faceting and polishing then turn the rough crystal into a finished diamond.
- Planning
- Faceting
- Polishing
05 · INDEPENDENT DOCUMENTATION
The Stone Is Put in Writing
An independent grading report records the characteristics and exact scope of the stone or jewelry item it covers. Depending on the report type, this can include origin, shape and cutting style, measurements, carat weight, color, clarity, cut-related grades, growth method and treatment comments.
- Report scope matters
- 0.50 ct+ selected stone
- Signora certificate included
06 · SIGNORA CRAFT
From Diamond to Forever Piece
Once the stone and design are confirmed, our Surat workshop creates the setting in the selected solid precious metal, secures the stones, hand-finishes the surfaces and inspects the completed piece before dispatch. The science creates the diamond. The craft gives it a life on the hand.
- Made to order
- Crafted in Surat
- Checked before dispatch
WHO DOES WHAT
Specialist growth. Independent documentation. Signora craftsmanship.
A transparent diamond story names each role clearly. The crystal is grown using specialist technology, the included IGI report—or any other stated report—is issued by an independent laboratory, and Signora turns the selected stone into made-to-order jewelry in Surat.
Specialist diamond growth
CVD technology creates the rough diamond crystal from a diamond seed and carbon-containing gas.
Independent documentation
The laboratory records only the stone or finished item and scope named on the exact report.
Signora jewelry craft
We match the selected stone to the approved design, prepare the setting, secure the stones, finish the piece and inspect it before dispatch.
THE SCIENCE, SIMPLIFIED
Inside the CVD chamber
A CVD reactor combines a diamond seed, low pressure, hydrogen, a carbon-containing gas and energy that activates a plasma. Carbon species reach the seed and add to its crystal structure, producing new diamond material.
- 01
What enters
A diamond seed, hydrogen and a carbon-containing gas.
- 02
What happens
Microwave energy activates a plasma, and carbon is deposited onto the seed under controlled conditions.
- 03
What comes out
A rough lab-grown diamond crystal that still requires planning, cutting and polishing.
This diagram explains the typical CVD route. The exact producer, growth conditions, timing and any post-growth treatment vary by stone and are not universal product specifications.
How a CVD lab-grown diamond grows
THE CUTTER'S DECISIONS
The rough holds potential. Cut releases it.
Two diamonds of equal carat can face up very differently. Proportion, symmetry, polish and facet arrangement influence how light travels through the finished stone. That is why a diamond cannot be judged by carat alone.
Understand the 4Cs and diamond quality →
WHAT COMES IN WRITING
Two records. Two different jobs.
An IGI report included under the 0.50 ct rule—or other documentation stated for the product or order—and the Signora Jewelry Certificate are not interchangeable. Each records a different part of what you are buying.
Independent grading report
An included grading report records the laboratory's findings and the exact scope stated on that document. A grading report describes quality and identity; it is not a price appraisal.
Each approved individual lab-grown center or primary diamond of 0.50 ct or more includes an independent IGI grading report. For diamonds below 0.50 ct and other stones, independent documentation is included only when the product page or approved custom-order specification states the laboratory, report type and scope.
Signora Jewelry Certificate
Included with every finished piece. It records the finished jewelry, selected materials and stated metal purity.
THE FINAL TRANSFORMATION IS HUMAN
A stone becomes jewelry through hundreds of small decisions.
Once the design, stone, metal, size and personal details are confirmed, the work moves to the bench. Each step is guided by the approved product selection or custom specification.
- 01
Confirm the piece
Stone, metal, size, setting, engraving and any custom details are checked before production.
- 02
Prepare the setting
The solid-metal setting and its components are prepared according to the approved design.
- 03
Set and finish
Stones are secured, surfaces are refined and the piece is hand-finished for its intended look and wear.
- 04
Inspect and document
The completed piece, finish, settings and included documentation are checked before packing and dispatch.
The science gives the diamond its crystal. Craft gives the piece its character.
CLARITY BEYOND THE SPARKLE
Four assumptions worth correcting
ASSUMPTION
Lab-grown means a diamond lookalike.
FACT
A lab-grown diamond is diamond. Cubic zirconia and moissanite are different materials.
ASSUMPTION
All lab-grown diamonds are identical.
FACT
They vary in carat, color, clarity, cut, proportions, growth features and treatment history, just as individual natural diamonds vary.
ASSUMPTION
Every stone in a jewelry piece has its own grading report.
FACT
Each approved individual lab-grown center or primary diamond of 0.50 ct or more includes its own IGI grading report. Accent diamonds, diamonds below 0.50 ct and other stones do not automatically receive individual reports; documentation for them is included only where stated in the product page or approved specification.
ASSUMPTION
CVD automatically proves zero environmental impact.
FACT
CVD identifies the growth method. Total environmental performance depends on energy, production, cutting, setting, transport and other product-specific factors.
QUESTIONS, ANSWERED
From growth method to grading report
What does CVD stand for?
CVD stands for Chemical Vapor Deposition. It is a low-pressure growth process in which a carbon-containing gas is activated into plasma and diamond material deposits onto a diamond seed.
Is a CVD lab-grown diamond a real diamond?
Yes. It is diamond with essentially the same chemical composition, crystal structure, optical properties and physical properties as a natural diamond. Its origin is laboratory growth rather than geological formation.
Is a lab-grown diamond the same as cubic zirconia or moissanite?
No. Cubic zirconia and moissanite are different materials. A lab-grown diamond is crystallized carbon.
Are all Signora lab-grown diamonds CVD-grown?
Do not assume one growth method for every stone. The product page, loose-diamond record or approved custom specification is the source of truth for the selected stone, and an applicable independent report states the growth method.
Can a CVD diamond receive treatment after growth?
Yes. Some CVD-grown diamonds receive post-growth treatment, often to refine color. When an independent report applies, read its treatment comments for the exact stone.
Does every Signora diamond have a separate IGI report?
Each approved individual lab-grown center or primary diamond of 0.50 ct or more includes an independent IGI grading report. For diamonds below 0.50 ct, accent stones and other stones, independent documentation is included only when the product page or approved specification states the laboratory, report type and scope.
Is every graded diamond laser-inscribed?
Not automatically. A girdle inscription should be treated as included only when the exact report confirms it. Ask Signora if the setting makes a stated inscription difficult to view.
What comes with every finished Signora piece?
Every finished piece includes a Signora Jewelry Certificate recording the finished piece, selected materials and stated metal purity. Applicable independent stone documentation is supplied separately according to the exact product or custom specification.
Where is Signora jewelry made?
Signora pieces are made to order and hand-finished in our workshop in Surat, India.
Can I choose a loose diamond before selecting a setting?
Yes. Explore the Diamond Vault or begin a custom design. The selected stone and setting are confirmed before production.
Where can I see finished lab-grown diamond jewelry from Signora?
Finished pieces are gathered on the lab-grown diamond jewelry page. Each design there is made to order and hand-finished in our workshop in Surat.
YOUR JOURNEY STARTS HERE
Choose the diamond. Shape the meaning.
Begin with a loose stone whose product record states its documentation, a made-to-order design or an idea that exists only in your mind. We will help you take it from specification to finished piece.
Book a free consultation →No payment to begin a custom brief · You approve the design before crafting · Insured delivery
Editorial note & sources
This page explains the typical CVD growth route for consumer education. Product-specific details—including growth method, treatments, grading-report scope, inscription and materials—are controlled by the exact product page, loose-diamond record, laboratory report or approved custom specification.