1.65 ct Natural Unheated Ruby – Oval Cut | GIA Certified | Madagascar

A natural 1.65 ct oval ruby, unheated: GIA Ruby Origin Report #2245032085 records No Indications of Heating. Ruby is natural corundum colored by chromium — the same mineral species as sapphire, but with enough chromium that the color enters the red range rather than remaining pink. Heat treatment is standard practice across the ruby trade, so an unheated stone above a carat with GIA documentation is an uncommon combination. The report records weight, dimensions, color and cutting style, and gives Madagascar as its geographic origin opinion.

Rarity Analysis

Several factors compound to make this specific stone unusual, not just desirable:

• Unheated Status: Heat treatment to lift color and apparent clarity is routine across the ruby trade, which is why an unheated stone is documented rather than simply asserted. Unheated is not the same as untreated: GIA's finding here is about heating specifically.
• Carat Weight: An unheated stone over a carat with a GIA report is not a combination we see often in our own buying — that is our assessment from what passes through us, not a published market figure.
• GIA Documentation: A GIA report recording "No Indications of Heating" is what separates a documented unheated stone from an undocumented claim. The finding is the laboratory's, not the seller's.
• Madagascar Origin: Madagascar is a significant modern ruby source. GIA gives Madagascar as its geographic origin opinion for this stone, based on a collection of observations and analytical data.
• Eye-Clean Clarity: No inclusions visible to the unaided eye — our own assessment, not a GIA grade, since GIA colored-stone reports carry no clarity grade.

Buying Guidance

A few things worth checking before buying any unheated, GIA-documented ruby like this one:

• Match the report to the stone: Confirm the GIA report number, measurements, and weight listed on the certificate match the physical stone you receive.
• Understand what "unheated" means: GIA's "No Indications of Heating" is a laboratory finding about heating, based on internal features. It is not a statement that no other treatment was applied, and it is not a judgement of color quality — evaluate the stone's color and clarity for yourself alongside the report.
• Ask about filling as well as heating: lead-glass filling is a separate treatment from heat and is widespread enough in the ruby trade to be worth asking about directly — a report that addresses heating does not by itself address filling. GIA Report #2245032085 records no filling for this stone.
• Choose a protective setting: An unheated, documented stone is worth protecting — prong or bezel settings that shield the girdle and pavilion from daily impact are a sensible choice for ring use. Corundum resists scratching very well, but like any faceted stone it can chip on a hard knock.
• Expect a premium over heated material: Unheated ruby with GIA documentation typically carries a higher price per carat than comparable heated material. Ask what the report actually says, and check that the premium is supported by it.
• Buy from a seller who discloses treatment plainly: Treatment status should be stated clearly and match the lab report — be cautious of listings that are vague about heating.

Learn More About This Gemstone

Ruby and sapphire are the same mineral species, corundum, so the guides below apply to both.

• Ruby — The Complete Buyer's Guide to the World's Most Valuable Colored Gemstone
• Spinel — The Collector's Guide to the World's Most Undervalued Gemstone
• What Is a GIA Sapphire Report and How Do You Read One?
• Oval Sapphire — The Complete Guide to the Most Popular Sapphire Cut
• Madagascar Sapphire — The Modern Origin That Rivals Ceylon

Why Choose this 1.65 ct Unheated Oval Ruby?

The GIA report is what separates a documented unheated ruby from an unsupported claim. Ruby sits in a category where identity and treatment both need checking: red spinel and pink-to-red sapphire have long been confused with ruby, and heating is routine enough that its absence has to be shown rather than asserted. Report #2245032085 identifies the material as natural corundum, natural ruby, at 1.65 ct and 7.77 x 5.98 x 4.39 mm, color Red, with No Indications of Heating under Additional Results, and gives Madagascar as GIA's geographic origin opinion.

Key Benefits of this Natural Unheated Ruby

• GIA-Documented Ruby
  Independent identification of species and variety, with weight, dimensions and cutting style recorded, and Madagascar given as GIA's origin opinion.
• Unheated
  No Indications of Heating, per GIA Report #2245032085 — a finding about heating specifically, not a statement that no other treatment was applied.
• Madagascar Origin
  A significant modern ruby source, and GIA's geographic origin opinion for this stone.
• Oval Mixed Cut
  A brilliant-cut crown over a step-cut pavilion, as recorded on the report — an outline that sets easily in rings and pendants.
• 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

• Item #: CG8456
• Carat Weight: 1.65 Carats
• Gem Type: Natural Ruby (Corundum)
• Cut: Oval — brilliant-cut crown, step-cut pavilion (a mixed cut)
• Dimensions: 7.77 x 5.98 x 4.39mm
• Origin: Madagascar — GIA geographic origin opinion
• Treatment: No indications of heating (GIA Report #2245032085)
• Color: Red
• Clarity: Eye-clean — no visible inclusions under normal viewing — our own assessment, not a GIA grade
• Transparency: Transparent
• Hardness: 9 on the Mohs scale — scratch resistance; a corundum species constant
• Certification: GIA Ruby Origin Report #2245032085

Care of Your Madagascar Ruby

• 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 Ruby Origin Report #2245032085
• Gemstone packed in a gem sleeve

Perfect Uses for this 1.65 ct Ruby

• Engagement ring center stone
• Statement pendant or cocktail ring
• Collectors of GIA-documented unheated natural ruby
• July birthstone gift
• Anniversary or romantic milestone gift