Bloodstone Jasper Identification Guide
Identify bloodstone jasper, opaque green jasper with red spotting, by its hardness, opacity, fracture, and how to separate it from green jasper and serpentine.
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What Bloodstone Jasper Looks Like
Bloodstone jasper is the jasper-classified form of bloodstone (heliotrope): an opaque, dense green chalcedony/jasper spotted and streaked with red from iron oxide. The name emphasizes its opaque, fully colored 'jasper' character versus more translucent chalcedony.
- Color: dark green to gray-green ground with red, orange-red, or rust spots and veins
- Luster: dull to waxy; polishes to a hard glassy shine
- Transparency: opaque
- Habit: massive, compact; no banding or crystals
Step-by-Step Field-ID Checklist
- Confirm opacity. It blocks light even on thin edges — true to its jasper nature.
- Spot the pattern. Green ground with red spots/veins is the identifying look.
- Hardness test. Scratches glass and steel (Mohs 6.5–7).
- Streak test. White streak (hematite-rich red zones may smear reddish).
- Polish/fracture check. Conchoidal fracture and a hard glassy polish confirm a quartz-family stone.
Key Diagnostic Tests
- Mohs hardness: 6.5–7; scratches glass, resists a knife.
- Streak: white.
- Cleavage/fracture: no cleavage; conchoidal fracture.
- Specific gravity: ~2.58–2.65.
- No acid reaction; not magnetic.
- Magnification: red spots are internal iron oxide, not dye in surface cracks.
Common Look-Alikes and How to Tell Them Apart
- Bloodstone/heliotrope: essentially the same material — 'bloodstone jasper' just stresses the opaque jasper character. Distinctions are nominal.
- Plain green jasper: lacks the red spotting; otherwise identical hardness and feel.
- Red-and-green dyed howlite/magnesite: much softer (3–3.5), won't scratch glass — a quick hardness test exposes it.
- Serpentine: greasy luster, soft (2.5–5), easily scratched.
- Unakite: pink-and-green but the colors come from pink feldspar and green epidote in a granite; it is granular/mottled, not a glassy chalcedony, and shows mineral grains rather than red spots.
- Kambaba/ocean jasper: orbicular green jaspers but with circular 'eye' patterns rather than red blood-spots.
The key checks are hardness 7 + opacity + green-with-red-spots: hardness rules out soft imitations and serpentine, while the spotting pattern distinguishes it from plain green jasper and orbicular jaspers.
Where Bloodstone Jasper Is Found
Like bloodstone, the main commercial source is India, with material also from Brazil, Australia, China, Madagascar, and the USA. It forms in altered, iron- and chlorite-bearing volcanic rocks where silica replaces or fills the rock, and is collected as nodules and gravels.
Quick Confirmation
An opaque green stone with red spots that scratches glass, breaks conchoidally, takes a glassy polish, and gives a white streak is bloodstone jasper — distinguished from soft dyed imitations and serpentine by its hardness, and from plain green jasper by its red spotting.
Frequently asked questions
How can you tell if bloodstone jasper is real?
Real bloodstone jasper is opaque green quartz with red iron-oxide spots: it scratches glass (hardness 6.5–7), has a white streak, breaks with a conchoidal fracture, and takes a hard glassy polish. Soft material that a knife scratches easily is likely dyed howlite or serpentine, not jasper.
What is the difference between bloodstone and bloodstone jasper?
They are essentially the same stone — opaque green chalcedony with red spots. The term 'bloodstone jasper' simply emphasizes its opaque, fully colored jasper character. Mineralogically there is no meaningful distinction.
Bloodstone jasper vs green jasper — how do I tell them apart?
Plain green jasper is uniformly green and opaque, while bloodstone jasper has the characteristic red or rust-colored spots and veins on a green ground. Both share the same hardness and quartz chemistry.
Is bloodstone jasper dyed?
Genuine bloodstone jasper gets its colors naturally — green from chlorite or amphibole and red from hematite. Be cautious of overly vivid pieces where red color pools in surface cracks, which can indicate dyeing, and verify hardness, since dyed soft stones won't scratch glass.
Bloodstone Jasper identified by the community
Recent Bloodstone Jasper specimens identified with Rock Identifier.
