1.75 ct Natural Heat-Treated Blue Sapphire – Round Cut | GIA Certified | Sri Lanka (Ceylon)

A natural 1.75 ct blue sapphire with a round outline, heat treated, documented by GIA Sapphire Origin Report #2243032036. The report records the weight, measurements of 6.57 - 6.78 x 5.07 mm, color Blue, Heated under Additional Results, and a cutting style of Modified Brilliant Cut on the crown over a Step Cut pavilion — a mixed cut rather than a plain round brilliant. It gives Sri Lanka as the geographic origin, and prints alongside it that any statement on geographic origin is an expert opinion based on a collection of observations and analytical data. Clarity is our own assessment: GIA colored-stone reports carry no clarity grade.

Rarity Analysis

This is a classic Sri Lankan blue sapphire, GIA-documented, and heated — the report records Heated under Additional Results. It is not a one-in-a-thousand phenomenon stone, and we won't describe it as one. What it does offer are things you can check against the document rather than take on trust:

• Sri Lankan Origin, Given by GIA
  GIA Sapphire Origin Report #2243032036 gives Sri Lanka as the geographic origin. GIA prints on the report that any statement on geographic origin is an expert opinion based on a collection of observations and analytical data, so we quote it as an opinion and never as a confirmation.
• A Mixed Cut, Not a Plain Round Brilliant
  The report records two cutting styles: a Modified Brilliant Cut crown over a Step Cut pavilion. Brilliant facets on top divide returning light finely; step facets below return it in broader planes. The round outline measures 6.57 - 6.78 mm across.
• Eye-Clean Clarity
  We assess this stone as eye clean — no inclusions visible to the unaided eye. That is our own assessment, not a GIA grade: GIA colored-stone reports carry no clarity grade at all.
• Heat Recorded on the Report
  The Additional Results field of GIA Report #2243032036 reads Heated. That is what the document records about heating; it is not a statement that no other treatment was applied, and we do not present it as one.
• Documented, Not Just Described
  Weight, measurements, color, cutting style and heating can all be checked against GIA Report #2243032036 rather than taken on a seller's word, and the origin can be read there as GIA's opinion. Clarity is the exception: that is our own assessment, and GIA issues no clarity grade for colored stones.

Buying Guidance

A few practical points to weigh before buying this stone, or any round-cut Ceylon blue sapphire in this size range:

• Confirm the Lab Report Matches the Stone
  Always check that the GIA report number (2243032036) and its stated measurements match the physical stone before you buy — we encourage you to review the report alongside the listing.
• Heat Is Not the Only Question to Ask
  Heating is routine in the sapphire trade, and the Additional Results field of GIA Report #2243032036 reads Heated. Diffusion is a separate and more consequential treatment, disclosed under different rules in most markets. Ask any seller which treatments their document actually covers — a report that addresses heating has, by itself, addressed heating.
• Round Outlines Favor Certain Settings
  A round outline works well in solitaire, halo, and three-stone settings; if you have a specific ring style in mind, confirm the 6.57 - 6.78 x 5.07 mm diameter suits your setting's head size.
• Compare Price Per Carat, Not Just Total Price
  Divide the asking price by the carat weight before comparing listings. Price per carat is the figure that makes stones of different sizes comparable, and it is the one to benchmark against other GIA-documented Sri Lankan sapphires.
• Ask About Setting Compatibility
  If this stone is destined for an engagement ring, discuss prong height and metal choice with your jeweler before setting. Mohs 9 measures scratch resistance rather than resistance to a knock; GIA's report lists corundum's toughness as excellent, but a step-cut pavilion still needs its edges protected.

Learn More About This Gemstone

• Blue Sapphire — The Complete Buyer's Guide to Color, Origin, and Value
• Ceylon Sapphire: The Complete Guide to the World's Most Trusted Sapphire Origin
• How Sapphire Heat Treatment Works — Temperature, Process, and What Changes Inside the Stone
• What Is a GIA Sapphire Report and How Do You Read One?
• Is a Round Sapphire Good for an Engagement Ring? Cut, Color, and What to Know Before You Buy
• Blue Sapphire Engagement Ring Guide: What Every Buyer Should Know Before Purchasing

Why Choose this Round Ceylon Blue Sapphire?

A round outline sets easily, and at 1.75 carats and 6.57 - 6.78 mm across this stone suits a ring or a pendant without a bespoke head. What the GIA report gives you beyond that is unusual for the price: the color call, the two cutting styles, the heating, and a geographic origin opinion, all on one document you can check yourself.

Key Benefits of this Natural Blue Sapphire

• Sri Lankan Origin, as GIA's Opinion
  GIA Sapphire Origin Report #2243032036 gives Sri Lanka as the geographic origin, and records the weight, measurements, color, cutting styles and heating.
• Round Outline, Mixed Cut
  A Modified Brilliant Cut crown over a Step Cut pavilion, as recorded on the report, in a round outline that sets easily in rings, pendants and earrings.
• Color Recorded as Blue
  The report's color call is Blue. GIA grades no saturation or tone on a colored-stone report, so that is the whole of what the document says about color.
• Heated, and Recorded as Such
  Additional Results on GIA Report #2243032036 reads Heated. Heating is routine in the sapphire trade; the document is what puts this stone's status beyond argument.
• Hard-Wearing
  Corundum is 9 on the Mohs scale, which measures scratch resistance. GIA's report lists corundum's toughness as excellent — that is the property that matters for a knock.

Features

• Carat Weight: 1.75 Carats
• Gem Type: Natural Blue Sapphire
• Cut: Round — Modified Brilliant Cut crown, Step Cut pavilion (a mixed cut)
• Dimensions: 6.57 - 6.78 x 5.07 mm
• Origin: Sri Lanka — GIA geographic origin opinion
• Treatment: Heated (GIA Sapphire Origin Report #2243032036)
• Color: Blue
• Clarity: Eye-clean — no visible inclusions under normal viewing — our own assessment, not a GIA grade
• Certification: GIA Sapphire Origin Report #2243032036
• Hardness: 9 on the Mohs scale — scratch resistance; a corundum species constant

Care of Your Ceylon Blue Sapphire

• Clean with lukewarm water and mild soap using a soft brush
• Store separately to avoid surface contact
• Remove before heavy physical activity
• Avoid ultrasonic or steam cleaners

What's Included

• GIA Sapphire Origin Report #2243032036
• Gemstone packed in a gem sleeve

Perfect Uses for this 1.75 ct Ceylon Blue Sapphire

• Sapphire engagement ring center stone
• Statement pendant or solitaire necklace
• Collectors of GIA-documented Ceylon blue sapphires
• Significant anniversary or milestone commission
• September birthstone gift