Marquise Shape Natural Diamonds
At SkyGem, we offer a premium collection of marquise natural white diamonds, admired for their elegant elongated silhouette, pointed ends, and exceptional brilliance. Our extensive range of GIA-certified marquise diamonds includes carefully selected loose diamonds to suit every style, budget, and occasion. Whether you're searching for the perfect centre stone for a custom engagement ring or investing in a natural diamond, you'll find exceptional quality at highly competitive prices.
Every diamond is ethically sourced, independently certified, and available with secure Australia-wide delivery. With access to one of Australia's largest selections of natural marquise diamonds, SkyGem makes it easy to compare, choose, and purchase your ideal diamond with confidence. All orders include fast, free, fully insured shipping, giving you complete peace of mind from purchase through to delivery.
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The shape of a diamond refers to its physical form, such as round, oval, or princess. Each shape has unique characteristics that influence the diamond’s overall appearance and sparkle. When choosing a shape, consider personal style, finger size, and how the diamond will be set in jewelry. Different shapes can enhance the diamond's brilliance or size and are suited to various aesthetic preferences.has context menu
The international unit of weight, used for measuring diamonds and gemstones. 1 carat is equal to 200 milligrams.
Diamond prices fluctuate frequently based on supply and demand or during our limited-time sales. For specific pricing information on your diamond of interest please click on that diamond in the search results below.
Describes the finish of the facets of the diamond. Polish is graded from Ideal, Excellent, Very Good, Good, Fair, or Poor. Polish grades of Good or higher have the least effect on the brilliance of the diamond and are suitable for the finest quality jewelry. Certain gem labs, such as Gemscan, incorporate Polish into an overall cut grade.
The cut refers to the angles and proportions of a diamond. The cut of a diamond—its depth and width, and the uniformity of the facets—determines its beauty. The skill with which a diamond is cut determines how well it reflects and refracts light.
Describes the alignment of the facets of the diamond. If facets are misaligned, the diamond may poorly reflect light. Symmetry is graded from Ideal / Excellent, Very Good, Good, Fair, or Poor. Symmetry grades of Good or higher have the least effect on the brilliance of the diamond and are suitable for the finest quality jewelry. Certain gem labs, such as Gemscan, incorporate Symmetry into an overall Cut grade.
Color is the natural color visible in a diamond and does not change over time. Colorless diamonds allow more light to pass through than a colored diamond, releasing more sparkle and fire.
The largest facet of a gemstone, located at the top. Table % is the table width as a percentage of the girdle diameter.
A diamond’s clarity refers to the presence of impurities on and within the stone. When a rough stone is extracted from carbon deep beneath the earth, tiny traces of natural elements are almost always trapped inside. These elements are called flaws or inclusions because they are formed naturally and are unique to each stone.
The height of a gemstone, from the culet to the table. Depth % is the height of the diamond as a percentage of the girdle diameter.
Describes the diamond's response to ultraviolet light. In diamonds with strong or very strong fluorescence, there may be some interference with the flow of light which causes a milky or oily appearance.
GIA (Gemological Institute of America)
A top-tier authority, GIA uses the 4Cs (Cut, Color, Clarity, Carat) and provides detailed reports.
HRD (Hoge Raad voor Diamant – Antwerp)
Europe’s leading lab, HRD also uses the 4Cs and issues comprehensive grading certificates.
AGS (American Gem Society)
Renowned for its focus on Cut quality, AGS employs a 0–10 scale; ‘0’ is “Ideal,” ensuring precise evaluations.
IGI (International Gemological Institute)
One of the largest labs worldwide, known for consistent standards and versatile certifications.
All are internationally recognized, offering credible assurance of diamond authenticity—boosting customer confidence and online conversions.
Select Your Natural White Diamond
Frequently Asked Questions
Find answers to common questions about Natural Diamonds
What is a natural diamond and how is it different from lab-grown diamonds?
A natural diamond is formed deep within the Earth over billions of years under extreme heat and pressure. Unlike lab-grown diamonds, natural diamonds are mined from the earth, carry long-term rarity, and traditionally hold stronger value over time. At SkyGem, all natural diamonds are ethically sourced and GIA certified.
Why should I buy diamonds from SkyGem?
SkyGem & Co. offers expertly curated, certified natural diamonds at transparent and competitive prices. Every diamond is individually selected for cut quality and brilliance, ethically sourced, and backed by independent GIA certification. With personalised guidance, custom craftsmanship, and lifetime aftercare, SkyGem delivers true value without traditional retail markups.
How can I verify the quality and authenticity of a natural diamond?
The quality of a natural diamond is verified through the 4Cs: Cut, Colour, Clarity, and Carat weight, along with an independent grading report. Reputable certifications such as GIA confirm the diamond's origin, quality, and authenticity. Every natural diamond from SkyGem is sold with full certification and transparent pricing.
Is it safe to buy diamonds online?
Yes, all diamonds online at SkyGem are GIA certified with full insurance, 360° video viewing, and detailed specifications. We offer secure checkout, fully insured shipping, and a 30-day return policy for complete peace of mind.
How do I know the diamond quality when buying online?
Every diamond online includes a GIA grading report, 360° HD video, and detailed cut, colour, clarity, and carat specifications. Our diamond experts are also available for virtual consultations to guide your purchase.
What is the delivery time for diamonds online?
Express shipping across Australia takes 1-3 business days. All shipments are fully insured and require signature on delivery. International shipping is also available on request.