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Inclusion check vs specific gravity test: which is better for telling if a crystal is real or fake?
Compare rock-crystal inclusion references with specific gravity data, and learn why neither supplied reference establishes bracelet authenticity.
Neither check is established as the better real-or-fake test by the supplied evidence: the inclusion reference describes natural rock crystal, while specific gravity cannot distinguish clear quartz from citrine. These references do not support recommending either method for every crystal bracelet.
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Inclusion check or specific gravity test: what can the references tell you?
| Criterion | Inclusion check | Specific gravity comparison |
|---|---|---|
| Reference available here | Natural inclusion features of clear quartz (rock crystal) | Published values for clear quartz and citrine |
| Supported comparison | Whether an observed feature appears in the rock-crystal inclusion list | Whether a measured value matches the published reference |
| Important limit | The list does not establish that a feature proves natural origin or that its absence proves a fake | Clear quartz and citrine share the same published value |
| Application to other bracelet materials | Not established by the supplied inclusion reference | Requires reference data for the material concerned |
The U.S. Geological Survey lists glass and plastics among substitutes for natural gemstones. It also reports that simulants are frequently substituted for natural gemstones; that general observation does not authenticate or discredit a particular bracelet.
What does the inclusion reference say about rock crystal?
The International Gem Society lists color zoning, two- and three-phase inclusions, and negative crystals as natural inclusions in clear quartz, also called rock crystal (IGS quartz information).
This is a list of features natural rock crystal can have, not a complete real-or-fake rule. It does not state that every natural bead must show these features, or that seeing one establishes natural origin.
The supplied inclusion reference covers rock crystal only. It does not provide an inclusion checklist for rutilated quartz, hematoid quartz, smoky quartz, amethyst, purple phantom quartz, aquamarine, freshwater pearl, cinnabar or wood.
What does specific gravity tell you about clear quartz and citrine?
The published specific gravity values do not distinguish clear quartz from citrine. The International Gem Society gives clear quartz a specific gravity of 2.651, described as very constant (IGS quartz information), and gives citrine the same value of 2.651 (IGS citrine information).
A match to this shared value cannot by itself decide which of these stones a bead is. The supplied excerpts also give no specific gravity reference for glass, so they do not provide a quartz-versus-glass identification rule. For a related label question, see checking whether carnelian and citrine beads match their label.
Do these references support a test recommendation for our bracelets?
These references do not support assigning either test to the listed bracelets as a complete authenticity check.
French Spring lists rutilated quartz, hematoid quartz, smoky quartz, cinnabar and a carved wood flower. Tide Chime lists aquamarine and natural freshwater pearl with gold-plated hardware. Neither material list makes the rock-crystal inclusion reference applicable to the whole bracelet.
Likewise, Amethyst Tide and Lilac Hour list amethyst, while Violet Mist lists purple phantom quartz. The supplied specific gravity excerpts do not cover those varieties. Their absence from these excerpts is a limit of this article's evidence, not proof that reference data does not exist.
Choose the inclusion reference if you want to compare observations with the documented features of rock crystal; choose the specific gravity references if you want to compare clear quartz or citrine data, recognizing that their published values are identical. No matching in-stock bracelet can responsibly be assigned to either branch as an authentication recommendation from the supplied evidence.
FAQ
If a crystal bead has no visible inclusions, is it fake?
The supplied inclusion list does not justify that conclusion. The International Gem Society lists color zoning, two- and three-phase inclusions, and negative crystals as features natural rock crystal can have; it does not say every natural bead shows them.
Can a specific gravity test tell citrine from clear quartz?
The published values cannot distinguish them: the International Gem Society gives both citrine and clear quartz a specific gravity of 2.651.
Can I use the rock-crystal inclusion list for a mixed-material bracelet?
The supplied evidence does not establish that application. Its inclusion list covers rock crystal, not all quartz varieties or the aquamarine, pearl, cinnabar and wood listed in the bracelets discussed here.
What materials are used to imitate natural gemstones?
The U.S. Geological Survey lists glass and plastics among substitutes for natural gemstones and notes that simulants are frequently substituted for natural gemstones.
