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1.84 carats Unheated Natural Blue Star Sapphire | Heart Cabochon

At 1.84-carat, no indication of heat becomes more than a specification — it becomes the character of this sapphire.

Gemstone $1,299.00

See this exact gemstone in compatible SARATTI settings.

This Unheated Natural Blue Star Sapphire presents a deep blue body colour with a smooth, softly diffused appearance. Under a concentrated point light source, a distinct six-rayed star crosses the polished surface, creating a luminous focal point that shifts as the gemstone or light source moves.

The gemstone is shaped as a full, symmetrical heart and finished en cabochon to display its natural asterism. Its rounded lobes, defined central cleft and tapered lower point frame the optical phenomenon, while the domed polished surface allows the mobile star to travel across the blue colour field. No obvious inclusions are visible under normal observation.

Weighing 1.84 ct and measuring 8.5 × 6.3 × 3.0 mm, the Sapphire offers a broad, romantic face-up proportion. Its heart-shaped silhouette is particularly suited to a pendant, symbolic centre-stone ring or bespoke cabochon-focused design that allows direct light to reach the surface and reveal the six-rayed star.

Characteristics
  • Colour: Deep blue with a softly diffused face-up appearance.
  • Carat Weight: 1.84 ct.
  • Dimensions: 8.5 × 6.3 × 3.0 mm.
  • Shape: Heart.
  • Cut: Heart Cabochon with a smooth, polished domed surface.
  • Clarity Appearance: No obvious inclusions are visible under normal observation.
  • Phenomenon: Distinct mobile six-rayed star visible under a strong point light source.
  • Durability and Care: Ranking 9 on the Mohs scale, Sapphire offers excellent resistance to scratching and is well suited to frequently worn fine jewellery when set and cared for appropriately.
  • Jewellery Suitability: Suitable for a heart-shaped pendant, centre-stone ring or bespoke design created to display the star phenomenon.
  • Certificate: Accompanied by a SARATTI Gemstone Identification Report.
Gemstone Details

Gemstone Type: Natural Blue Star Sapphire
Species: Corundum
Variety: Star Sapphire
Carat Weight: 1.84 ct
Shape: Heart
Cut: Heart Cabochon
Colour: Blue
Dimensions: 8.5 × 6.3 × 3.0 mm
Clarity: No obvious inclusions visible under normal observation
Phenomenon: Mobile six-rayed asterism
Treatment: Unheated
Certificate: SARATTI Gemstone Identification Report

September Birthstone

Sapphire is the traditional birthstone for September.
It is also associated with the 5th and 45th wedding anniversaries.
Star Sapphire is distinguished by an optical phenomenon known as asterism, visible under a concentrated point light source.

Design Invitation

The heart-shaped cabochon is especially suited to a pendant or symbolic centre-stone ring that keeps its domed surface clearly visible. Platinum or white gold would create a cool contrast with the deep blue colour, while a fine protective bezel or carefully positioned prongs could secure the outline without obstructing the mobile star. The gemstone may be acquired loose or developed through SARATTI’s bespoke jewellery service.

Your gemstone is set into the design you choose. Every pairing is reviewed by a specialist before production begins.

HANDPICKED

Chosen with judgement — looking beyond the certificate to colour, character, proportion and presence.

HANDCRAFTED

Each piece is considered around the stone, with proportion, setting, comfort and finish working together.

HEARTFELT

Personal guidance and thoughtful creation shaped around the person, the moment and what the piece is meant to become.

CARED FOR, AFTERWARDS

Secure delivery and ongoing care long after the piece leaves our hands.

This Unheated Natural Blue Star Sapphire presents a deep blue body colour with a smooth, softly diffused appearance. Under a concentrated point light source, a distinct six-rayed star crosses the polished surface, creating a luminous focal point that shifts as the gemstone or light source moves.

The gemstone is shaped as a full, symmetrical heart and finished en cabochon to display its natural asterism. Its rounded lobes, defined central cleft and tapered lower point frame the optical phenomenon, while the domed polished surface allows the mobile star to travel across the blue colour field. No obvious inclusions are visible under normal observation.

Weighing 1.84 ct and measuring 8.5 × 6.3 × 3.0 mm, the Sapphire offers a broad, romantic face-up proportion. Its heart-shaped silhouette is particularly suited to a pendant, symbolic centre-stone ring or bespoke cabochon-focused design that allows direct light to reach the surface and reveal the six-rayed star.

Why we chose this stone

No indication of heat at 1.84-carat.

Consider this sapphire if no indication of heat is the quality you want to notice first. At 1.84-carat, the heart outline gives that strength enough space to remain visible once the stone is set.

  • NO INDICATION OF HEAT
  • BLUE
  • 1.84 CT

Gemstone details

Gemstone Type
Natural Blue Star Sapphire
Species
Corundum
Variety
Star Sapphire
Carat Weight
1.84 ct
Shape
Heart
Cut
Heart Cabochon
Color
Blue
Dimensions
8.5 × 6.3 × 3.0 mm
Clarity
No obvious inclusions visible under normal observation
Phenomenon
Mobile six-rayed asterism
Treatment
Unheated
Enquire about this stone
1.84 carats Unheated Natural Blue Star Sapphire | Heart Cabochon
Natural blue sapphire hand-set in a fine jewellery ring, claws closed by one setter | SARATTI Blue sapphire gemstone ring held in the hand, seat cut to its measured depth | SARATTI

HANDCRAFTED

A stone this hard
still asks for a gentle hand.

Sapphire outlasts the metal around it, which is why the metal has to be right. Seat cut to its measured depth, every claw closed by one setter. A ring worn daily, a pendant close to the skin, a matched pair for earrings.

Discover our craftsmanship

Your next step

Two ways to continue, and no hurry to choose.

Have it set

Choose a setting and the atelier builds it around this stone's measurements. You see images of the finished piece before it travels to you.

Create with this stone

Take the stone as it is

The stone travels loose, with its report, insured and signed for. Set it with your own jeweller, or come back to us whenever you are ready.

Purchase the stone alone
SARATTI signature presentation SARATTI signature presentation
Signature Presentation

Every SARATTI piece is prepared in our signature presentation, carefully protected for a refined reveal and secure delivery.

Complimentary Insured Shipping

SARATTI offers complimentary insured express shipping on all orders. Each piece is carefully prepared, protected, and sent through trusted express couriers.

Learn More
Ask a SARATTI Advisor

Speak with a SARATTI concierge for help with gemstones, sizing, personalization, delivery, or bespoke adjustments before placing your order.

Responsibly Chosen Materials

Every SARATTI piece is created with considered materials, selected stones, and careful craftsmanship. We choose quality with intention, so each jewel feels meaningful from selection to final delivery.

Size Guide

Use the SARATTI size guide to choose the right fit for your ring, bracelet, necklace, or made-to-order piece.

Before you decide

Questions worth asking.

Is this the exact gemstone I will receive — and can I see more of it?

Yes. The gemstone shown on this page is the individual stone you are considering — not a representative image from a parcel.

We photograph and film the actual stone and do everything possible to show its color, proportions and character faithfully. Even so, gemstones can respond differently to daylight, warm interior light and different screens.

If you are uncertain, we can provide additional photographs or video and, where useful, reshoot the stone under different lighting or from another angle before you decide.

Can I confirm the gemstone is still available before I proceed?

Of course.

Send us the product link or reference and our concierge can confirm availability before you proceed.

For an important purchase, we would rather confirm first than have you make a decision around a stone that has already been spoken for.

How do I know which setting will suit this gemstone?

The builder presents settings intended to work with the gemstone you have selected.

Before production begins, the pairing is reviewed for proportion, security and suitability.

If we believe another setting, proportion or approach would serve the stone better, we will tell you before anything is made. The setting should serve the gemstone — not simply accommodate it.

What happens after I choose my gemstone and setting?

We confirm the important details with you before production begins.

That includes your gemstone, setting, metal, side stones where relevant, size, engraving and any personal details.

Nothing enters production until the final specification has been reviewed and approved.

Will I see the finished piece before it is sent?

Yes.

Once your piece is complete, it is photographed and filmed with your gemstone set into it.

Those images are sent to you before dispatch, so you can see the finished jewel before it leaves SARATTI.

How long will my piece take?

Made-to-order pieces generally require around three to four weeks from final approval to completion.

A loose gemstone purchased on its own can usually be prepared for dispatch much sooner.

If you are working towards a proposal, anniversary, birthday or travel date, tell us before ordering. We will let you know what is realistically possible rather than promise a date we cannot honour.

How will my order be delivered?

Your order is sent by insured courier with tracking and appropriate delivery security.

The route and carrier depend on destination and value.

Where duties or local taxes may apply, our concierge can explain the available delivery options before dispatch.

Can I return a loose gemstone?

A loose gemstone may be returned within fourteen days of delivery provided it remains unworn, unset and unaltered, with its packaging and documentation intact.

Please contact us before sending anything back so the return can be arranged securely.

What happens once the gemstone has been set?

A jewel created around your selected gemstone is made specifically for you.

Once the final specification has been approved and production has begun, the gemstone and materials are committed to your piece.

That is why we take time to confirm the details with you before making begins.

What if I am still unsure?

Then do not rush the decision.

We can help you compare this gemstone with another, look again at color or proportion, send additional imagery, discuss a setting or simply talk through what matters most to you.

The right stone should feel considered — not hurried.

What happens after I receive my piece?

Our relationship does not end at delivery.

SARATTI provides ongoing care for the jewelry we create, including inspection, cleaning and appropriate maintenance support as the piece is worn over time.

If anything ever concerns you, speak with us before attempting repair or alteration elsewhere.