Carrasite Jasper Identification Guide

What Carrasite Jasper Looks Like

Carrasite Jasper is a trade-named patterned jasper — an opaque, iron-rich variety of microcrystalline quartz (chalcedony) valued for its swirling, landscape-like designs. Like all jaspers, it is colored and patterned by mineral impurities, mainly iron oxides.

• Color: earth tones — cream, tan, brown, ochre, red, and gray, often blended in flowing patterns.
• Luster: dull to waxy on natural surfaces; vitreous when polished.
• Transparency: opaque (a defining jasper trait).
• Texture: dense, fine-grained, smooth; swirling, mottled, or banded patterning.

Step-by-Step Field-ID Checklist

1. Confirm opacity: jasper does not transmit light even on thin edges (separates it from translucent agate/chalcedony).
2. Hardness test: scratches glass and steel easily (Mohs ~6.5–7).
3. Examine the break: smooth conchoidal fracture with sharp edges.
4. Look at the pattern: natural, irregular swirls and color blending in earthy tones; no repeating units.
5. Acid test: no fizz (silica) — rules out any carbonate stone.

Key Diagnostic Tests

• Mohs hardness: 6.5–7.
• Streak: white (despite colored body).
• Fracture: conchoidal; no cleavage.
• Acid: inert.
• Density: ~2.6 g/cm³.
• Polish: takes a high, glassy polish typical of silica.

Common Look-Alikes

• Other patterned jaspers (Picasso, Polychrome, Ocean Jasper): all opaque silica with earthy swirls; Carrasite is distinguished mainly by its specific color blend and provenance rather than by physical tests. When uncertain, all read simply as "jasper."
• Agate: translucent on edges with banding, whereas jasper is fully opaque.
• Marble/dyed stone: marble fizzes in acid and is soft; dyed stone shows color pooled in cracks.
• Porcelain jasper / common opal: common opal is softer (5.5–6.5) and often slightly translucent; jasper is harder and opaque.

Where Carrasite Jasper Is Found

As a trade name, Carrasite Jasper has limited documented provenance; patterned jaspers of this kind come from silica-rich volcanic and sedimentary deposits worldwide (notably Mexico, the western USA, and Madagascar). The defining identification is generic jasper testing plus its characteristic swirled earth-tone appearance.