宝石折射率 — 参考表

130种宝石的折射率数值，按最大RI由高到低排列，附双折射与光学特性。折射率用折射仪测量，由矿物结构决定，是宝石学中最可靠的常数之一。

宝石名称采用国际贸易通用的英文名，并链接到各品种的详细页面(英文)。

在GemID中输入你的测量值，引擎会自动缩小候选范围。应用提供中文界面。

宝石	RI最小	RI最大	双折射	光学特性
Cinnabar	2.905	3.256	0.351	DR_U+
Hematite	2.940	3.220	0.280	DR_U-
Cuprite	2.849	2.849	—	SR
Moissanite	2.648	2.691	0.043	DR_U+
Sphalerite	2.369	2.500	—	SR
Blue Diamond	2.417	2.417	—	SR
Brown Diamond	2.417	2.417	—	SR
Diamond	2.417	2.417	—	SR
Pink Diamond	2.417	2.417	—	SR
Yellow Diamond	2.417	2.417	—	SR
Cubic Zirconia	2.150	2.180	—	SR
Sphene	1.843	2.110	0.100	DR_B+
Cassiterite	2.010	2.100	0.096	DR_U+
Zircon	1.925	1.984	0.059	DR_U+
Malachite	1.655	1.909	0.254	DR_B-
Demantoid Garnet	1.880	1.895	—	SR
YAG	1.833	1.833	—	SR
Almandine Garnet	1.770	1.830	—	SR
Star Garnet	1.770	1.830	—	SR
Rhodochrosite	1.600	1.820	0.220	DR_U-
Low-Type Zircon	1.780	1.815	—	SR
Spessartite Garnet	1.790	1.815	—	SR
Benitoite	1.757	1.804	0.047	DR_U+
Malaya / Umbalite Garnet	1.730	1.780	—	SR
Color-Change Sapphire	1.762	1.770	0.008	DR_U-
Padparadscha Sapphire	1.762	1.770	0.008	DR_U-
Pink Sapphire	1.762	1.770	0.008	DR_U-
Rhodolite Garnet	1.740	1.770	—	SR
Ruby	1.762	1.770	0.008	DR_U-
Sapphire	1.762	1.770	0.008	DR_U-
Star Ruby	1.762	1.770	0.008	DR_U-
Star Sapphire	1.762	1.770	0.008	DR_U-
Synthetic Color-Change Corundum	1.762	1.770	0.008	DR_U-
White Sapphire	1.762	1.770	0.008	DR_U-
Yellow Sapphire	1.762	1.770	0.008	DR_U-
Color-Change Garnet	1.740	1.765	—	SR
Hessonite Garnet	1.730	1.760	—	SR
Pyrope Garnet	1.730	1.760	—	SR
Tsavorite Garnet	1.730	1.760	—	SR
Grossular Garnet	1.734	1.759	—	SR
Alexandrite	1.746	1.755	0.009	DR_B+
Cat's Eye Chrysoberyl	1.746	1.755	0.009	DR_B+
Chrysoberyl	1.746	1.755	0.009	DR_B+
Diaspore	1.685	1.752	0.048	DR_B+
Rhodonite	1.716	1.752	0.014	DR_B+
Spinel	1.712	1.736	—	SR
Kyanite	1.712	1.734	0.016	DR_B-
Black Spinel	1.712	1.730	—	SR
Chrome Diopside	1.664	1.730	0.030	DR_B+
Synthetic Spinel	1.725	1.728	—	SR
Taaffeite	1.719	1.723	0.004	DR_U-
Star Diopside	1.664	1.721	0.030	DR_B+
Sinhalite	1.665	1.712	0.038	DR_B-
Thulite	1.691	1.704	0.009	DR_B+
Tanzanite	1.691	1.700	0.009	DR_B+
Kornerupine	1.660	1.699	0.013	DR_B-
Pearl	1.520	1.690	—	AGG
Peridot	1.654	1.690	0.036	DR_B+
Jadeite	1.654	1.688	—	AGG
Jet	1.640	1.680	—	SR
Hiddenite	1.660	1.676	0.016	DR_B+
Kunzite	1.660	1.676	0.016	DR_B+
Clinohumite	1.625	1.675	0.028	DR_B+
Enstatite	1.663	1.673	0.010	DR_B+
Lapis Lazuli	1.500	1.670	—	AGG
Phenakite	1.654	1.670	0.016	DR_U+
Prehnite	1.611	1.665	0.030	DR_B+
Chrome Tourmaline	1.624	1.660	0.018	DR_U-
Coral	1.486	1.658	—	AGG
Green Tourmaline	1.616	1.650	0.018	DR_U-
Turquoise	1.610	1.650	—	AGG
Watermelon Tourmaline	1.616	1.650	0.018	DR_U-
Andalusite	1.629	1.649	0.010	DR_B-
Apatite	1.628	1.649	0.006	DR_U-
Indicolite	1.624	1.644	0.018	DR_U-
Paraiba Tourmaline	1.624	1.644	0.018	DR_U-
Rubellite	1.624	1.644	0.018	DR_U-
Tourmaline	1.624	1.644	0.020	DR_U-
Topaz	1.609	1.643	0.008	DR_B+
Larimar	1.595	1.640	0.040	DR_B+
Danburite	1.627	1.636	0.006	DR_B-
Chrysocolla	1.460	1.630	—	AGG
Nephrite	1.600	1.627	—	AGG
Grandidierite	1.590	1.623	0.033	DR_B-
Sugilite	1.607	1.610	0.002	DR_U-
Howlite	1.583	1.608	—	AGG
Emerald	1.565	1.602	0.006	DR_U-
Morganite	1.572	1.600	0.008	DR_U-
Variscite	1.560	1.590	0.031	DR_B-
Aquamarine	1.577	1.583	0.006	DR_U-
Goshenite	1.577	1.583	0.006	DR_U-
Heliodor	1.568	1.580	0.006	DR_U-
Red Beryl	1.564	1.574	0.007	DR_U-
Labradorite	1.559	1.573	0.011	DR_B-
Rainbow Moonstone	1.559	1.572	0.011	DR_B-
Scapolite	1.540	1.572	0.020	DR_U-
Sunstone	1.537	1.572	0.010	DR_B-
Serpentine	1.560	1.571	—	AGG
Iolite	1.540	1.560	0.012	DR_B-
Charoite	1.550	1.559	0.009	AGG
Amethyst	1.544	1.553	0.009	DR_U+
Ametrine	1.544	1.553	0.009	DR_U+
Aventurine	1.544	1.553	—	AGG
Citrine	1.544	1.553	0.009	DR_U+
Hawk's Eye	1.544	1.553	—	AGG
Prasiolite	1.544	1.553	0.009	DR_U+
Rock Crystal	1.544	1.553	0.009	DR_U+
Rose Quartz	1.544	1.553	0.009	DR_U+
Smoky Quartz	1.544	1.553	0.009	DR_U+
Tiger's Eye	1.544	1.553	—	AGG
Amber	1.539	1.545	—	SR
Agate	1.530	1.543	—	AGG
Bloodstone	1.530	1.543	—	AGG
Carnelian	1.530	1.543	—	AGG
Chalcedony	1.530	1.543	—	AGG
Chrysoprase	1.530	1.543	—	AGG
Onyx	1.530	1.543	—	AGG
Ivory	1.535	1.540	—	AGG
Pietersite	1.534	1.540	—	AGG
Amazonite	1.514	1.530	0.008	DR_B-
Moonstone	1.518	1.526	0.008	DR_B-
Moldavite	1.480	1.510	—	SR
Obsidian	1.480	1.510	—	SR
Hauyne	1.494	1.509	—	SR
Hackmanite	1.483	1.487	—	SR
Sodalite	1.483	1.487	—	AGG
Fire Opal	1.370	1.470	—	SR
Opal	1.370	1.470	—	SR
Black Opal	1.440	1.460	—	SR
Fluorite	1.432	1.436	—	SR

哪种宝石折射率最高？
在本参考的130种宝石中，Cinnabar的RI最高(2.905–3.256)；作为对比，钻石为2.417。标准折射仪在约1.81以上读数超限(OTL)。

钻石的折射率是多少？
钻石的折射率为2.417。钻石为单折射，无双折射 — 这是与双折射的莫桑石的区别之一。

红宝石的折射率是多少？
红宝石的RI为1.762–1.770，双折射0.008。蓝宝石是同一矿物(刚玉)，数值范围相同。

另见: Reference Database (EN) · Guide (EN)