Comparison · Organic Gems
Red Coral vs Pearl
Red Coral and Pearl are easy to confuse because both are organic gems. Both sit near Mohs 3.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Red Coral and Pearl
- Both sit near Mohs 3.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Luster is different: Red Coral is vitreous while Pearl is pearly.
- They overlap in pink and white, but Red Coral also comes in red and orange and Pearl also comes in black and yellow.
- Well-formed crystals give it away: Red Coral is trigonal, Pearl is orthorhombic.
Red Coral vs Pearl properties
| Property | Red Coral | Pearl |
|---|---|---|
| Type | Organic Gems | Organic Gems |
| Mohs hardness | 3.5 | 3 |
| Luster | vitreous | pearly |
| Streak | White | White |
| Transparency | opaque | opaque |
| Specific gravity | 2.65 | 2.7 |
| Crystal system | trigonal | orthorhombic |
| Common colors | Red, Pink, Orange, White | White, Cream, Pink, Black, Gold |
| Rarity | rare | uncommon |
| Typical specimen value | $50–$3000+ | $50–$100000+ |
Which is more valuable?
Pearl is usually the more valuable of the two: a typical collector specimen runs about $500 against $300 for Red Coral, and premium Pearl can reach $100000 or more.
About Red Coral
Precious coral is formed from the skeletons of marine animals. Red coral from the Mediterranean has been prized for jewelry for thousands of years.
About Pearl
Pearls are organic gems formed inside mollusks. Natural pearls are extremely rare; most pearls today are cultured by inserting a nucleus into the mollusk.
Red Coral vs Pearl FAQ
Is Red Coral the same as Pearl?
No. Both are organic gems, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 3.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Red Coral from Pearl?
Both sit near Mohs 3.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Luster is different: Red Coral is vitreous while Pearl is pearly. They overlap in pink and white, but Red Coral also comes in red and orange and Pearl also comes in black and yellow.
Which is harder, Red Coral or Pearl?
Red Coral is harder: Mohs 3.5 against Mohs 3 for Pearl.
Which is more valuable, Red Coral or Pearl?
Pearl is usually the more valuable of the two: a typical collector specimen runs about $500 against $300 for Red Coral, and premium Pearl can reach $100000 or more.
