Identification guide · Quartz Family
How to Identify Blue Lace Agate
Blue Lace Agate is usually pale blue, white, and blue with a waxy luster and is translucent. It has a Mohs hardness of 7. It scratches glass and a steel knife and cannot be scratched by a steel file. Its streak is white. It is most often confused with Agate, Chalcedony, and Dendritic Agate; the tests below separate them.
Blue Lace Agate identification checklist
| Color | Pale Blue, White, Blue, Gray | Look at a clean, dry surface in daylight. Color zoning, banding or spots are as diagnostic as the hue. |
|---|---|---|
| Luster | Waxy | Compare a fresh surface with glass and metal; this luster is softer than either. |
| Transparency | Translucent | Hold a thin edge up to a bright light and note whether light passes through. |
| Mohs hardness | 7 | It scratches glass and a steel knife and cannot be scratched by a steel file. |
| Streak | White | Drag a corner across unglazed porcelain (the back of a bathroom tile) and check the powder color. |
| Cleavage | None | |
| Fracture | Conchoidal | Broken surfaces show smooth, curved, shell-like scoops. |
| Specific gravity | 2.6 | Ordinary rock-like heft (specific gravity about 2.6), similar to quartz. |
| Crystal system | Hexagonal |
Blue Lace Agate look-alikes and how to tell them apart
Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Blue Lace Agate vs Agate →
Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Blue Lace Agate vs Chalcedony →
Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Blue Lace Agate vs Dendritic Agate →
Both sit near Mohs 7, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
Is my Blue Lace Agate real?
- Hardness: real Blue Lace Agate sits at Mohs 7. Glass imitations are about 5.5, so genuine Blue Lace Agate scratches glass while a glass fake cannot.
- Bubbles: round gas bubbles under a 10x loupe mean glass or resin, never a natural stone.
- Color: dyed material concentrates color in cracks and pores; look for pigment collecting at the edges of fractures.
- Temperature: natural crystals feel cool and take longer to warm in your hand than plastic or resin.
Field tips
- Look for the distinctive color, pattern, and translucency associated with Blue Lace Agate.
- Photograph a fresh or polished surface in natural light and avoid glare.
- Use hardness, luster, fracture, and locality together; many chalcedony trade varieties overlap visually.
Blue Lace Agate identification FAQ
How can you tell if a rock is Blue Lace Agate?
Check the color (pale blue, white, blue, and gray), the waxy luster, a Mohs hardness of 7 and a white streak. Photographing it with the StoneSnap app gives a match in seconds.
What is the hardness of Blue Lace Agate?
Blue Lace Agate has a Mohs hardness of 7. It scratches glass and a steel knife and cannot be scratched by a steel file.
What is the difference between Blue Lace Agate and Agate?
Blue Lace Agate (Mohs 7, waxy luster) and Agate (Mohs 7, waxy luster) look alike, but hardness, streak and heft usually separate them. See the full Blue Lace Agate vs Agate comparison for a side-by-side table.
How do I know if my Blue Lace Agate is real?
Real Blue Lace Agate matches the hardness listed above, shows no round gas bubbles under magnification, and does not concentrate dye in cracks. Glass and resin fakes fail at least one of those checks.
Is Blue Lace Agate worth anything?
Entry-level Blue Lace Agate specimens sell for around $8, typical collector pieces about $35, and premium examples $250 or more depending on size, quality and locality.
What color is Blue Lace Agate?
Blue Lace Agate is most often pale blue, white, blue, and gray. Color varies with impurities and locality, so confirm with hardness and luster rather than color alone.
