1.50 ct Natural Heated Yellow Sapphire – Round Cut | GIA Certified | Sri Lanka (Ceylon)

A natural 1.50 carat yellow sapphire in a round cut, from Sri Lanka (Ceylon), heat treated, and documented by GIA Sapphire Origin Report #1246017783, which gives Sri Lanka as its origin opinion and records a colour stability test on the stone with no change observed. That second finding matters: a colour stability test is not a standard line on a sapphire report, and here it was run with no change observed. At 1.50 carats the round cut carries a warm, strongly saturated golden colour, which suits an engagement ring, a pendant, or a collection.

Rarity Analysis

A few factors make this particular 1.50 ct yellow sapphire more distinctive than a typical stone of its type:

• Color: A strong, medium-intense yellow with a saturated golden face-up appearance rather than a pale or washed-out tone.
• Size: At 1.50 carats, this stone is larger than the sub-1-carat yellow sapphires that dominate entry-level inventory, giving it more presence as a center stone.
• Treatment: Heat treated, the standard and most common treatment for sapphire, disclosed directly on GIA Report #1246017783.
• Clarity: Loupe clean by our own assessment — no inclusions visible under 10x magnification. GIA coloured-stone reports carry no clarity grade, so this is our own observation and not a laboratory finding.
• Documentation: A GIA Sapphire Origin Report giving Sri Lanka as its origin opinion and recording a colour stability test with no change observed. GIA states geographic origin as an expert opinion rather than an absolute finding — we would rather quote it that way than overstate what a lab can determine.
• Combined effect: A Ceylon origin opinion, a colour stability test with no change observed, a 1.50 ct size and a stone our own examination finds loupe clean are each ordinary enough alone. Together on one heated yellow sapphire they are less common than any of them suggests.

Buying Guidance

A few practical points to weigh before purchasing this specific stone:

• View it in natural daylight when possible. Yellow sapphire can read differently under warm incandescent light versus daylight or LED, so daylight gives the truest sense of this stone's strong, saturated golden hue.
• Check the measurements before you choose a mounting. At 6.29-6.36 x 4.78 mm the stone falls between the standard 6.00 mm and 6.50 mm sizes and is 0.07 mm out of round, so a prong head will need fitting to it and a bezel should be made to its measurements.
• Ask what the paperwork actually covers. Origin, treatment and colour stability are three separate findings, and a report may carry one without the others. Ours carries all three; it does not grade clarity. Ask any seller to be equally specific.
• This is a single stone. As a natural gem it is one of a kind, and this particular combination of colour, size, documentation and treatment cannot be reordered.
• Use the Try Before You Buy option if you would like to see the stone in hand before finalizing the purchase.

Learn More About This Gemstone

• Yellow Sapphire Buyer's Guide
• Unheated Sapphire Guide
• GIA Guide
• Custom Ring Guide
• Sapphire Buying Guide

Why Choose this 1.50 ct Round Yellow Sapphire?

A round is the most forgiving shape to set and the easiest to match later, and at 1.50 carats it has real presence. The cut is what GIA calls a Modified Round Brilliant — a brilliant-cut crown over a step-cut pavilion — so it returns light like a brilliant while the stepped pavilion holds the golden colour rather than breaking it up. Like any yellow, it warms under incandescent light and cools toward daylight; both suit it.

Key Benefits of this Natural Yellow Sapphire

• GIA-Documented Origin and Treatment
  Heat treatment recorded, and Sri Lanka given as GIA's origin opinion, on Report #1246017783.
• Colour Stability Test — No Change Observed
  GIA tested the stone for colour stability and observed no change under the test conditions. That is a test result, not a lifetime guarantee.
• Strong Golden Colour
  A warm, saturated yellow that holds its depth in a ring or a pendant.
• Versatile Design Use
  Suited to a ring, a pendant, or a custom piece built around a single stone.
• Hard-wearing
  Corundum at Mohs 9 — it resists the scratching that dulls a stone worn every day. Mohs measures scratch resistance, not resistance to a knock.

Features

• SKU: CG8451
• Carat Weight: 1.50 carats
• Gem Type: Natural Yellow Sapphire
• Shape: Round
• Cut Style: Modified Round Brilliant
• Origin: Sri Lanka (Ceylon) — GIA's origin opinion on Report #1246017783
• Treatment: Heat Treated (GIA Report #1246017783)
• Color: Yellow
• Transparency: Transparent
• Clarity: loupe clean — our own assessment, not a GIA grade
• Colour Stability: test recorded on the GIA report; no colour change observed under the test conditions
• Certification: GIA Sapphire Origin Report #1246017783
• Hardness: 9 on the Mohs scale

Care

• Clean with lukewarm water and mild soap using a soft brush, then rinse and dry with a soft cloth
• Store separately — at Mohs 9 this stone will scratch almost anything it is kept with
• Remove before heavy physical activity or manual work
• Avoid ultrasonic and steam cleaners — vibration and thermal shock can stress fine internal features in any gemstone

What's included with the gemstone

• GIA Sapphire Origin Report #1246017783
• Gemstone packed in a gem sleeve.

This yellow sapphire was selected for the strength of its colour and the completeness of its documentation — origin opinion, treatment and colour stability all recorded by GIA.

What to Look at First

• Three separate findings on one report: heat treatment recorded, Sri Lanka given as GIA's origin opinion, and a colour stability test with no change observed.
• The colour: a strong, warm yellow at medium-intense saturation — golden rather than lemon.
• Perfect for Custom Jewelry: Ideal centerpiece for unique designs.
• Ceylon origin: given as GIA's expert opinion on Report #1246017783, not asserted by us.

This 1.50 ct round yellow sapphire is documented more thoroughly than most stones at its price — origin, treatment and colour stability, all on one GIA report.