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        Star Sapphire Value, Price, and Jewelry Information

        Star Sapphire

        Star Sapphire Value

        See our article called?Phenomenal Gems?to read more about the grading and valuation of stones with asterism.

        The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

        Sapphire Value via Gem Price Guide

        Kashmir Sapphire

        Certified origin. Untreated material.

        Average brilliancy of 40 to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis.

        Top Grade: vB 5/6, 6/6. B 5/6, 6/6.
        Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
        VVS ,000 to ,650/ct ,000 to ,000/ct ,000 to ,500/ct to ,000/ct
        VS/SI ,000 to ,000/ct ,000 to ,700/ct ,000 to ,000/ct to ,000/ct
        SI/I ,000 to ,000/ct ,000 to 24,600/ct ,000 to 27,600/ct to ,000/ct
        Very Good Grade: V 4/6, 5/6, 6/5. bV 5/6, 6/6; vB 5/5, 4/6, 6/5.
        Very Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
        VVS ,000 to ,300/ct ,600 to ,400/ct ,000 to ,000/ct to ,000/ct
        VS/SI to ,100/ct ,000 to ,700/ct ,000 to ,000/ct to ,500/ct
        SI/I to ,300/ct ,000 to ,000/ct ,400 to ,600/ct to ,500/ct
        Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 5/4, 4/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 5/4, 4/5.
        Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
        VVS to ,200/ct to ,700/ct ,000 to ,000/ct to ,000/ct
        VS/SI to /ct to ,200/ct ,000 to ,000/ct to ,000/ct
        SI/I to /ct to ,500/ct ,000 to ,000/ct to ,900/ct
        Fair Grade: V 3/4, 3/5, 4/4, 4/3, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 7/4, 6/2, 5/3; B 3/4, 4/3, 7/4 6/2, 5/2, 5/3.
        Fair Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
        VVS to /ct to ,200/ct to ,500/ct to ,500/ct
        VS/SI to /ct to /ct to ,000/ct to ,000/ct
        SI/I to /ct to /ct to ,500/ct to ,700/ct

        Other Blue Sapphires

        Heat treated material. Average brilliancy of 40% to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis. Note: If certified Burmese and untreated, add 50%, except fair or lower grades.

        Typically, mid-quality untreated blue sapphire will sell for 20-30% more than a treated stone of the same quality. Top-quality unheated stones could get a premium of 50% or higher, especially if they're large.

        Top Grade: vB 5/6, 6/6; B 5/6, 6/6.
        Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
        VVS to /ct to /ct to /ct to ,500/ct
        VS/SI to /ct to /ct to /ct /ct
        SI/I to /ct to /ct to /ct /ct
        Very Good Grade: V 4/6, 5/5, 6/6; bV 5/6, 6/7; vB 5/5, 4/6, 6/5; B 4/6, 5/5, 6/5; vslgB 4/6, 5/6, 6/6.
        Very Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
        VVS to /ct to /ct to /ct to /ct
        VS/SI to /ct to /ct to /ct to /ct
        SI/I to /ct to /ct to /ct to /ct
        Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 6/4, 6/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 6/4, 5/4, 4/5; vslgB 7/5, 5/4, 6/4, 4/5, 6/5, 5/5; gB 4/5, 5/5, 6/5.
        Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
        VVS to /ct to /ct to /ct to /ct
        VS/SI to /ct to /ct to /ct to /ct
        SI/I to /ct to /ct to /ct to /ct
        Fair Grade: V 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 6/2, 7/4, 5/3; B 3/4, 4/3, 7/4, 6/2, 5/2, 5/3; vslgB 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; gB 3/5, 4/4, 5/3, 5/4, 6/3, 6/4, 7/4; vstgB 4/4, 5/4, 6/4.
        Fair Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
        VVS to /ct to /ct to /ct to /ct
        VS/SI to /ct to /ct to /ct to /ct
        SI/I to /ct to /ct to /ct to /ct

        Fancy Sapphires

        Average brilliancy of 30% to 40%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 7% to 10% for rounds, pears and marquis. Add 15% to 30% for emerald cuts.

        Pink Sapphire

        Top Color: stpR 3/6, 4/6; RP 4/6; rP 4/6 No trade data available Very Good Color: slpR 4/6; stpR 4/5; RP 3/5, 4/4, 4/5; rP 3/5, 4/4, 4/5; P 4/5.
        Very Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
        VVS to /ct to /ct to /ct to ,500/ct
        VS/SI to /ct to /ct to /ct to /ct
        SI/I to /ct to /ct to /ct to /ct
        Good Color: slpR 3/5, 4/4, 4/5; stpR 3/4, 3/5, 4/4; RP 3/4, 4/3; rP 3/4, 4/3; P 3/4, 4/4.
        Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
        VVS to /ct to /ct to /ct to /ct
        VS/SI to /ct to /ct to /ct to /ct
        SI/I to /ct to /ct to /ct to /ct
        Fair Color: slpR 3/3, 4/3; stpR 3/4, 4/3; RP 2/3, 3/3; rP 2/3, 3/3; P 3/, 4/3.
        Fair Color .75 to 1 carat 1 to 2 carats 2 carats plus
        VVS to /ct to /ct to /ct
        VS/SI to /ct to /ct to /ct
        SI/I to /ct to /ct to /ct

        Yellow Sapphire

        Top Color: Y 3/5; oY 3/5. Very Good Color: Y 3/4; oY 3/4. Good Color: Y 3/3, 4/4; oY 3/3, 4/4. Fair Color: Y 2/3, 4/3; oY 2/3, 4/3.
        Yellow Sapphire to 2 carats 2 carats plus
        Top Color to /ct to /ct
        Very Good Color to /ct to /ct
        Good Color to /ct to /ct
        Fair Color to /ct to /ct

        Green Sapphire

        Top Color: vslbG 6/3, bG 6/3, G 6/3. Very Good Color: BG 6/3, vstbG 6/2, 5/3, 6/2; bG 4/3, 5/3, 6/3; vslbG 4/3, 5/3, 6/2; G 5/3, 7/3; slyG 5/3, 6/3; yG 6/3. Good Color: BG 4/3, 5/3, 6/2; vstbG 4/3, 5/3, 7/3; bG 4/2, 5/2, 7/3, G 5/2,6/2; slyG 5/2, 6/2, 7/3; yG 5/3, 6/2, 7/3; styG 5/3, 6/3; styG 5/3, 6/3. Fair Color: BG 4/2, 5/2; vstbG 4/2, 7/2; bG 3/2, 7/2; vslbG 7/2; G 4/2, 7/2; slyG 4/2, 7/2; yG 5/2, 7/3; styG 5/2, 6/2.
        Green Sapphire to 1 carat 1 carat plus
        Top Color to /ct to /ct
        Very Good Color to /ct to /ct
        Good Color to /ct to /ct
        Fair Color to /ct to /ct

        Purple Sapphire

        Top Color: RP 6/6, 5/6; rP 6/6; P 6/6. Very Good Color: stpR 5/5, 6/5; RP 5/5, 6/5, 7/5; rP 5/6, 6/5; P 5/6, 6/5; bP 5/6, 6/5. Good Color: slpR 5/3, 6/3; stpR 5/4, 6/4, 7/4; RP 5/4, 6/3, 6/4, 7/4; rP 5/4, 5/5, 6/4, 7/5; P 5/4, 5/5, 6/4, 7/5; bP 4/5, 4/6, 5/5. Fair Color: .
        Purple Sapphire to 2 carats 2 carats plus
        Top Color to /ct to /ct
        Very Good Color to /ct to /ct
        Good Color to /ct to /ct
        Fair Color to /ct to /ct

        Other Sapphires

        White Sapphire .5 to 3 carats 3 to 5 carats 5 to 15 carats
        to /ct to /ct to /ct
        Color Change Sapphire .5 to 1 carat 1 to 7 carats
        to /ct to /ct
        Blue Cabochons .5 to 1 carat 1 to 7 carats
        to /ct to /ct
        Star Sapphire .5 to 1 carat 1 to 5 carats
        Blue to /ct to /ct
        Fancy Colors to /ct to /ct
        Black to /ct to /ct

        Star Sapphire Information

        Data Value
        Name Star Sapphire
        Is a Variety of Sapphire
        Colors All except red.
        Crystallography Hexagonal (trigonal).
        Refractive Index 1.757-1.779
        Luster Vitreous to adamantine.
        Polish Luster Vitreous to subadamantine.
        Fracture Luster Vitreous.
        Hardness 9
        Wearability Excellent
        Fracture Conchoidal, Frequent parting
        Specific Gravity 3.99-4.10; usually near 4.0
        Birefringence 0.008-0.009
        Cleavage None
        Dispersion 0.018
        Luminescence See "Identifying Characteristics" under the Sapphire main gem listing.
        Luminescence Present Yes
        Luminescence Type Fluorescent, UV-Long, UV-Short, X-ray Colors
        Enhancements Heat treated: common. Diffusion treatment (places a thin blue coating on colorless sapphire): occasional. Irradiation (turns colorless gems yellow, orange, or light blue.): rare.
        Typical Treatments Heat Treatment, Irradiation, Lattice Diffusion
        Transparency Transparent to opaque.
        Absorption Spectrum See "Identifying Characteristics" under the Sapphire main gem listing.
        Phenomena Asterism.
        Birthstone September.
        Pleochroism

        Very pronounced.

        • Blue sapphire: intense violet-blue/blue-green
        • Green sapphire: intense green / yellow-green
        • Orange sapphire: yellow-brown or orange/colorless
        • Yellow sapphire: medium yellow / pale yellow
        • Purple sapphire: violet/orange
        • Brownish-orange sapphire: brownish-orange / greenish
        • Padparadscha sapphire: orange-yellow / yellowish-orange
        Optics

        RI: o = 1.757-1.770; e = 1.765-1.779 (usually 1.760, 1.768); Uniaxial (-).

        Optic Sign Uniaxial -

        Star Sapphire is a type of sapphire displaying?an optical star-like effect. This effect is caused by asterism.?You can read more about asterism in our Phenomenal Gems article.

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