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Natural Parti Sapphire 4.02 Ct Asscher Cut Loose Gemstone | Bi-Colour Green Yellow Sapphire

One-of-a-Kind Natural Sapphire — Available Only Once

✔ Natural Earth-Mined
✔ Certified Gemstone
✔ Engagement Ring Ready
✔ Free Worldwide Shipping
✔ 15-Day Returns
Sale price$4,290.00 USD

Natural Parti Sapphire weighing 4.02 carats, featuring an Asscher cut, bi-colour green and yellow tones, VVS clarity and heat treatment. Offered as a loose gemstone for custom jewellery and supplied with certification from an authorised gemmologist.

This natural parti sapphire displays a distinctive combination of green and yellow colours within a single gemstone. Weighing 4.02 carats and cut in an Asscher style, it offers strong visual presence and geometric symmetry, making it suitable for custom engagement rings, pendants, and bespoke jewellery designs.

Quick Summary

  • Gemstone: Natural Parti Sapphire
  • Weight: 4.02 Carat
  • Shape: Asscher Cut
  • Colour: Bi-Colour Green & Yellow
  • Clarity: VVS
  • Treatment: Heat Treated
  • Birthstone: September
  • Certification: Included

Parti sapphires are natural sapphires that display multiple colours within a single gemstone. Their distinctive colour zoning creates a unique appearance that differs from traditional single-colour sapphires, making them popular among collectors and buyers seeking one-of-a-kind gemstones.

Sapphire belongs to the corundum family and ranks 9 on the Mohs hardness scale, making it suitable for jewellery intended for regular wear when professionally set. The Asscher cut highlights symmetry, clarity, and colour distribution through its step-cut faceting pattern.

As the birthstone for September, sapphire is traditionally associated with wisdom, sincerity, and loyalty. Its durability and timeless appeal have made it a popular choice for engagement rings and heirloom-inspired jewellery.

Gemstone Specifications

  • Identification: Natural Sapphire
  • Species: Natural Corundum
  • Variety: Parti Sapphire
  • Shape / Cut: Asscher Cut
  • Clarity: VVS
  • Weight: 4.02 Carat
  • Colour: Bi-Colour Green Yellow
  • Measurements: 8.80 × 9.50 × 5.00 mm
  • Treatment: Heat Treated
  • Birthstone: September

Certification & Authenticity

This sapphire includes certification from an authorised gemmologist confirming its identity as a natural sapphire and disclosing treatment information.

Seller Notes: Clean appearance. Natural characteristics may be visible under magnification and are consistent with natural gemstone formation.

Colour appearance may vary slightly under different lighting environments due to the gemstone's natural colour zoning and bi-colour composition.

Jewellery Applications

This gemstone is sold loose and is not supplied as a finished ring or jewellery item.

  • Custom Engagement Rings
  • Statement Rings
  • Pendants and Necklaces
  • Bespoke Fine Jewellery
  • September Birthstone Jewellery
  • Gemstone Collections

Custom jewellery services are available using gold, rose gold, white gold, silver, and platinum settings, with optional diamond accents.

Why Choose This Parti Sapphire?

Parti sapphires are appreciated for displaying multiple natural colours within a single gemstone. The combination of green and yellow tones, large 4.02 carat size, VVS clarity, and Asscher cut make this gemstone an attractive option for buyers seeking a distinctive sapphire for custom jewellery or collecting.

Explore Related Sapphire Collections

Browse our Parti, Teal and Blue Green Sapphire Collection, explore all Loose Sapphire Gemstones, or learn more through our Gemstone Education Articles.

Shipping & Returns

Worldwide shipping is available with tracking and insurance included. Delivery times vary by destination. Buyers are responsible for applicable customs duties or import taxes.

Returns are accepted according to our published return policy. Refunds are processed after the returned gemstone has been received and inspected.

Frequently Asked Questions

Is this a natural parti sapphire?

Yes. This gemstone is identified as a natural parti sapphire from the corundum family.

What colours are present in this sapphire?

This sapphire displays natural green and yellow colour zoning, creating a bi-colour appearance.

Has this sapphire been treated?

Yes. This gemstone has undergone heat treatment, which is disclosed in the specifications.

Does the sapphire include certification?

Yes. Certification from an authorised gemmologist is included.

Can this gemstone be used in an engagement ring?

Yes. Its durability, size, and Asscher cut make it suitable for custom engagement ring designs.

Is this sold as a loose gemstone?

Yes. This sapphire is sold loose and is not supplied as a finished jewellery item.

Teal bi-color Parti Sapphire, 4.02 Ct Asscher emerald cut, loose gemstone by NASHGEMS, showcasing green and yellow hues.
Natural Parti Sapphire 4.02 Ct Asscher Cut Loose Gemstone | Bi-Colour Green Yellow Sapphire Sale price$4,290.00 USD

💎 Not Sure Which Sapphire To Choose?

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We can help you choose the ideal gemstone based on:

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✔ Engagement ring suitability

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WHAT IS A PARTI SAPPHIRE?

 

  • A parti sapphire is a natural sapphire that displays two or more colours within the same gemstone. The colours are usually visible at the same time and may include combinations of blue, green, yellow, teal, and other complementary hues.

    Every parti sapphire has its own natural colour distribution, making each gemstone unique. Some stones display clearly separated areas of colour, while others show softer transitions and blended shades.

WHAT COLOURS CAN A PARTI SAPPHIRE HAVE?

 

  • Parti sapphires can display a remarkable variety of natural colour combinations. The most commonly seen combinations include blue and green, blue and yellow, green and yellow, and gemstones displaying blue, green, and yellow together.

    Some parti sapphires may also show teal, olive, golden, or other secondary tones. The appearance of each gemstone depends on its natural colour zoning, cut, and the way light interacts with the stone.

WHAT MAKES A SAPPHIRE A PARTI SAPPHIRE?

 

  • A sapphire is described as a parti sapphire when it displays more than one colour within the same gemstone. These colours result from natural variations in the conditions and trace elements present during the sapphire's formation.

    The colours can occur in different zones within the crystal. When the gemstone is cut, these natural colour zones can create distinctive patterns and combinations visible from the top of the finished sapphire.

WHAT IS NATURAL COLOUR ZONING IN A PARTI SAPPHIRE?

 

  • Colour zoning refers to areas of different colour that naturally occur within a sapphire crystal. In a parti sapphire, these zones can create visible combinations of two or more colours within the same gemstone.

    Colour zoning is one of the features that gives parti sapphires their distinctive appearance. Depending on the gemstone and its cut, the colours may appear as separate areas, blended transitions, or complex patterns.

WHAT IS THE DIFFERENCE BETWEEN A PARTI SAPPHIRE AND A BI-COLOUR SAPPHIRE?

 

  • A parti sapphire is generally used to describe a sapphire displaying two or more colours. A bi-colour sapphire specifically refers to a gemstone displaying two distinct colours.

    The terms can sometimes overlap because a sapphire displaying two colours may also be described as a parti sapphire. The most important characteristic is the natural presence of multiple colours within the same gemstone.

WHAT IS THE DIFFERENCE BETWEEN A PARTI SAPPHIRE AND A TEAL SAPPHIRE?

 

  • A teal sapphire generally refers to a sapphire displaying a blend of blue and green colours that create an overall teal appearance.

    A parti sapphire is defined by the presence of two or more colours within the gemstone, which may include blue, green, yellow, teal, or other combinations. A sapphire may sometimes display colours associated with teal while also having the distinct colour zoning associated with a parti sapphire.

ARE PARTI SAPPHIRES GOOD FOR ENGAGEMENT RINGS?

 

  • Yes. Parti sapphires are an excellent choice for engagement rings because sapphire has a hardness of 9 on the Mohs scale. This makes sapphire one of the most durable gemstones commonly used in fine jewellery.

    The unique colour combinations found in parti sapphires make them particularly appealing to people looking for an engagement ring that feels individual and different from traditional diamond or single-colour sapphire designs.

WHY ARE PARTI SAPPHIRES POPULAR FOR ENGAGEMENT RINGS?

 

  • One-of-a-Kind Appearance: The natural distribution of colours means that no two parti sapphires look exactly alike.

    Multiple Colours in One Gemstone: Parti sapphires can combine beautiful shades of blue, green, yellow, and teal within a single stone.

    Durable & Long-Lasting: With a hardness of 9 on the Mohs scale, sapphire is suitable for jewellery designed for regular wear when properly set and cared for.

    Highly Personal Choice: The unusual colours and natural patterns make parti sapphires particularly appealing for custom engagement rings and bespoke jewellery.

HOW DO I CHOOSE THE BEST PARTI SAPPHIRE?

 

  • Choosing the best parti sapphire is highly personal because every gemstone has a different colour combination and pattern. Some buyers prefer strong and clearly separated colours, while others are attracted to softer blends and transitions.

    When selecting a parti sapphire, consider the overall colour balance, brightness, cut, clarity, size, shape, treatment status, and how the gemstone will be used in your intended jewellery design.

DOES THE CUT OF A PARTI SAPPHIRE AFFECT ITS COLOUR?

 

  • Yes. The cut of a parti sapphire can significantly influence how its natural colours are displayed. A skilled cutter can position the gemstone to highlight attractive colour zones and create a balanced appearance when viewed from above.

    Different shapes and cutting styles may display colour zoning differently. For this reason, photographs and videos can be especially useful when selecting a parti sapphire for a custom jewellery design.

CAN PARTI SAPPHIRES LOOK DIFFERENT UNDER DIFFERENT LIGHTING?

 

  • Yes. Like many coloured gemstones, a parti sapphire can appear somewhat different under different lighting conditions. Natural light, indoor lighting, and the angle from which the gemstone is viewed can influence how its colours are perceived.

    This does not necessarily mean that the sapphire is a colour-change gemstone. The appearance can simply be affected by lighting and the way light interacts with the gemstone's natural colour zones and cut.

WHAT METALS PAIR WELL WITH PARTI SAPPHIRES?

 

  • Parti sapphires can work beautifully with a variety of precious metals because their multiple colours offer many design possibilities.

    Yellow gold can enhance warmer yellow and green tones, while white gold and platinum can create a clean contrast with blue and green colours. Rose gold can also create an attractive contrast depending on the individual sapphire's colour combination.

WHAT JEWELLERY CAN BE MADE WITH A PARTI SAPPHIRE?

 

  • Loose parti sapphires are ideal for creating unique custom jewellery. They can be used in engagement rings, pendants, earrings, bracelets, and bespoke jewellery designs.

    Because every gemstone has its own colour pattern, a parti sapphire can become the centrepiece of a truly one-of-a-kind piece of jewellery.

ARE PARTI SAPPHIRES NATURAL?

 

  • Yes. A natural parti sapphire develops its multiple colours through natural colour zoning within the sapphire crystal.

    When purchasing any gemstone, it is important to review the individual product description and available certification information to understand the sapphire's origin, treatment status, and other characteristics.

ARE PARTI SAPPHIRES HEATED OR UNHEATED?

 

  • Parti sapphires may be offered as either heated or unheated, depending on the individual gemstone. Treatment information should always be reviewed before purchasing.

    Unheated sapphires have not undergone heat treatment, while heated sapphires have been subjected to controlled heating processes. Treatment status can influence rarity, price, and buyer preference.

ARE PARTI SAPPHIRES RARE?

 

  • The availability of parti sapphires can vary depending on the colour combination, size, clarity, origin, and overall quality of the gemstone. Particularly attractive or unusual colour combinations may be more difficult to find.

    Every natural parti sapphire is individual because its colour distribution cannot be exactly duplicated. Buyers should consider the beauty and character of the specific gemstone rather than relying only on rarity.

ARE PARTI SAPPHIRES CERTIFIED?

 

  • Certification availability depends on the individual gemstone. A gemological laboratory certificate can provide information about the identity of a sapphire and may include details relating to natural origin and treatment status.

    Reviewing available certification and gemstone information can help buyers make a more informed purchasing decision when selecting a parti sapphire.

HOW DO I CARE FOR A PARTI SAPPHIRE?

 

  • Parti sapphires are durable gemstones, but all fine jewellery should be cared for properly. Regular cleaning with warm water, mild soap, and a soft brush is generally suitable for most sapphire jewellery.

    The safest cleaning method can depend on the gemstone's treatment, setting, and surrounding materials. Avoid unnecessary impacts and have frequently worn jewellery settings inspected periodically.

WHY CHOOSE A PARTI SAPPHIRE FROM NASH GEMS?

 

  • At Nash Gems, we offer a selection of natural loose parti sapphires featuring a variety of colours, shapes, sizes, and natural patterns. Every gemstone has its own individual character.

    Detailed product information, photographs, and gemstone specifications can help you select a parti sapphire for an engagement ring, custom jewellery project, gemstone collection, or other special purpose.