Black Star Sapphire
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Hardness
9.0 on the Mohs scale.
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Occurrence
Myanmar (Burma), Thailand, India, Sri Lanka (Ceylon), Tanzania, Afghanistan, Australia, Brazil, Cambodia, Malagasy Republic, Malawi, Pakistan, Zimbabwe (Rhodesia), United States (Montana, North Carolina).
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Appearance
Black sapphires are found in the form of star sapphires. These dark six-rayed stars are very attractive. These can be confused with star diopside which only have a four-rayed star.
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Enhancements
Black star sapphire is always heat treated to produce, intensify or lighten color and/or improve color uniformity and appearance.
More information on gemstone enhancements.
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Gemstone Family
Black Star Sapphire is a member of the Sapphire gemstone family.
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Black Star Sapphire
Black Star Sapphire
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0.94 ct. total, 'AA' Grade |
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| 4.0mm Cabochon, Round Cut |
| Black |
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| Opaque |
| [N] Not enhanced. |
| Only one pair available. |
| With an excellent six rayed star. |
| Black Star Sapphire |
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|
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0.49 ct., 'AA' Grade |
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| 4.8mm Cabochon, Round Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
|
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|
|
|
0.90 ct., 'AA' Grade |
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| 5.7mm Cabochon, Round Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
|
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|
|
|
0.96 ct., 'AA' Grade |
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| 5.9mm Cabochon, Round Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
|
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|
|
|
0.29 ct., 'AA' Grade |
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| 3.5mm Cabochon, Round Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| Quantity Available: 15 |
| Black Star Sapphire |
|
|---|
|
|
|
0.62 ct., 'AA' Grade |
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| 5.0mm Cabochon, Round Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| Quantity Available: 5 |
| Black Star Sapphire |
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|---|
|
|
|
0.62 ct., 'AA' Grade |
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| 5.9mm Cabochon, Round Cut |
| Black |
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| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
|
|---|
|
|
|
1.92 ct., 'AA' Grade |
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| 10.0x8.0mm Cabochon, Oval Cut |
| Black |
|
| Opaque |
| [H] Heated to improve color. |
| One of a kind. |
| Black Star Sapphire |
|
|---|
|
|
|
1.56 ct., 'AA' Grade |
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| 7.5x5.4mm Cabochon, Oval Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
|
|---|
|
|
|
0.73 ct., 'AA' Grade |
|---|
| 6.2x4.2mm Cabochon, Oval Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
|
|---|
|
|
|
0.38 ct., 'AA' Grade |
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| 5.7x3.1mm Cabochon, Marquise Cut |
| Black |
|
| Opaque |
| [N] Not enhanced. |
| One of a kind. |
| Black Star Sapphire |
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Calibrated Black Star Sapphire
Calibrated Black Star Sapphire
Specify size, shape and quality when ordering. Prices are subject to change without notice. Actual carat weight may vary from the average carat weight listed.
- AA Black, medium dome, excellent star, good polish, good cut.
- A Black, medium dome, good star, good polish, good cut.
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| Black Star Sapphire |
Quality |
AA |
A |
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| Shape |
Size |
Avg. Weight |
Price Each |
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3.5mm
|
0.47 ct.
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4mm
|
0.45 ct.
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4.5mm
|
0.70 ct.
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|
|
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5mm
|
0.74 ct.
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5.5mm
|
1.02 ct.
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6mm
|
1.37 ct.
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6.5mm
|
1.72 ct.
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7mm
|
2.08 ct.
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7.5mm
|
2.49 ct.
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|
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8mm
|
3.11 ct.
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AA |
A |
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5x3mm
|
0.36 ct.
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6x4mm
|
0.85 ct.
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|
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6.5x4.5mm
|
0.92 ct.
|
| |
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7x5mm
|
1.35 ct.
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|
|
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7.5x5.5mm
|
1.54 ct.
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8x6mm
|
1.88 ct.
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9x7mm
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2.85 ct.
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10x8mm
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4.02 ct.
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11x9mm
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5.49 ct.
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12x10mm
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7.15 ct.
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AA |
A |
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8x4mm
|
0.90 ct.
|
| |
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10x5mm
|
1.40 ct.
|
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