X
Gemstone Search

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

Heat Only Sapphire Gemstones

Browse natural heat only sapphire gemstones, enhanced solely by traditional heat treatment for improved color and clarity.

Sapphire Heat-Only Weight
Sapphire Heat-Only Size
Sapphire Heat-Only Clarity
Sapphire Heat-Only Price
Sapphire Heat-Only Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color
Black Sapphire Heat-Only
Blue Sapphire Heat-Only
Brown
Gray Sapphire Heat-Only
Green Sapphire Heat-Only
Multicolor Sapphire Heat-Only
Orange Sapphire Heat-Only
Pink Sapphire Heat-Only
Purple Sapphire Heat-Only
Red Sapphire Heat-Only
Turquoise Sapphire Heat-Only
Violet Sapphire Heat-Only
White Sapphire Heat-Only
Yellow Sapphire Heat-Only
Single
Pairs
Lots
Faceted
Cabochons
X
Clear All

0.39ct Purple Sapphire, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 46.80

View Details

1.11ctw Blue Sapphire, Round, VS

5 mm (calibrated)

$ 586.08

View Details

0.60ct Blue Sapphire, Round, VVS-VS

5 mm (calibrated)

$ 486.97

View Details

0.79ctw White Sapphire, Round, VS

4.5 mm (calibrated)

$ 125.54

View Details

15.48ct Black Star Sapphire, Oval, Opaque

13.9 x 13.4 mm

$ 241.49

View Details

0.54ct Green Sapphire, Cushion, VVS-VS

4.2 x 4.1 mm

$ 77.76

View Details

1.99ctw Multicolor Sapphire, Square, VS

2.4 x 2.3 mm

$ 286.56

View Details

0.43ct Pink Sapphire, Oval, VVS

6 x 4 mm (calibrated)

$ 51.60

View Details

0.59ct Multicolor Sapphire, Cushion, VS

4.6 x 4.6 mm

$ 56.64

View Details

0.55ct Yellow Sapphire, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 79.20

View Details

0.39ct Yellow Sapphire, Round, VVS-VS

4.5 mm (calibrated)

$ 27.14

View Details

0.69ct Blue Sapphire, Marquise, VVS-VS

7.8 x 3.9 mm

$ 194.00

View Details

0.40ct Pink Sapphire, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 48.00

View Details

0.73ct Multicolor Sapphire, Cushion, VVS

5.4 x 4.4 mm

$ 70.08

View Details

0.47ct Pink Sapphire, Oval, VS

5.1 x 4.2 mm

$ 57.13

View Details

0.84ct Green Sapphire, Cushion, VS

6.1 x 4.5 mm

$ 100.80

View Details

0.63ct Multicolor Sapphire, Cushion, VVS-VS

5.2 x 4.2 mm

$ 60.48

View Details

3.95ct Black Star Sapphire, Pear Shape, Opaque

10 x 8.4 mm

$ 85.32

View Details

1.67ctw White Sapphire, Round, VS

4.5 mm (calibrated)

$ 265.39

View Details

0.64ct Purple Sapphire, Oval, VVS-VS

6.2 x 4.3 mm

$ 101.38

View Details

0.74ct Green Sapphire, Cushion, VVS-VS

5.6 x 4.5 mm

$ 71.04

View Details

1.13ct Violet Sapphire, Cushion, VS

7 x 5 mm (calibrated)

$ 447.48

View Details

2.23ctw Blue Sapphire, Briolette, VS

4.9 x 3.3 mm

$ 88.31

View Details

0.63ct Violet Sapphire, Oval, VS

6.6 x 4.8 mm

$ 84.68

View Details

Why Buy Sapphire Heat-Only from GemSelect?

Heat Only Sapphire Stones

Our heat only sapphire stones are natural gemstones enhanced using traditional heat treatment only, without diffusion or chemical additives, preserving their authenticity and value.

What Does Heat Only Mean?

Heat only sapphires are gemstones that have undergone controlled heating to improve color and clarity. This is the most widely accepted treatment in the gem trade and does not involve foreign elements.

Loose Heat Only Sapphire Gemstones for Jewelry

Natural Sapphire Colors

Heat only sapphires are available in a wide range of colors, including blue, pink, yellow, green, and parti-color varieties, offering versatility for all types of jewelry designs.

Heat Only vs Untreated Sapphire

While untreated sapphires are completely natural, heat only sapphires offer improved appearance at a more accessible price point, making them a popular choice for both collectors and jewelry makers.

Loose Sapphires for Custom Jewelry

Choose from a variety of shapes such as oval, round, cushion, and pear. Heat only sapphire gemstones are ideal for rings, earrings, and pendants thanks to their durability and brilliance.

No Diffusion or Filling

All our heat only sapphires are free from diffusion treatment, glass filling, or dyeing. Full disclosure ensures confidence and transparency with every purchase.

Certified Sapphire Gemstones

Many of our heat only sapphire gemstones come with gemological certification verifying treatment status, origin, and quality characteristics.

Wholesale Heat Only Sapphires

We offer competitive pricing for bulk purchases, making our heat only sapphires suitable for jewelers, designers, and gemstone dealers worldwide.

Learn more about sapphire treatments and properties on our Sapphire Information Page.

FAQs

What is a heat only sapphire?

A heat only sapphire is a natural gemstone that has been treated with heat alone to enhance its color and clarity, without any additional chemicals or diffusion processes.

Are heat only sapphires natural?

Yes, heat only sapphires are natural gemstones. Heat treatment is a standard and accepted process in the gemstone industry.

Is heat treatment permanent?

Yes, heat treatment is stable and permanent under normal wear, making it suitable for everyday jewelry.

What is the difference between heat only and diffusion sapphire?

Heat only sapphires are treated using heat alone, while diffusion sapphires involve the introduction of external elements to alter color, which is considered a more invasive treatment.

Are heat only sapphires valuable?

Yes, they are more valuable than heavily treated stones and offer a good balance between natural authenticity and improved appearance.

Can I use heat only sapphires for engagement rings?

Yes, sapphires are durable (Mohs 9) and suitable for engagement rings, especially when properly set and cared for.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate
Enlarged Gemstone Image