Ruby (Synthetic - Flame Fusion) Gemstone & Information | Gemopedia by JTV | Gemopedia™
The flame fusion process for creating gems, also called the Verneuil process, is the most affordable and common synthesis method for producing corundum (ruby and sapphire) and spinel. Powdered chemicals (the building blocks of the gem) are dropped through a high-temperature flame. The molten powder repeatedly falls from the flame onto a rotating pedestal, creating a synthetic crystal, called a boule, which can later be faceted into a gemstone. Synthetic gems have the same chemical, optical, and physical properties of their natural counterparts, but are a more cost-effective alternative to a natural gem.
Slightly Orangy Red, Strong Red, Slightly Purplish Red
Ruby-synthetic-flame-fusion classificationCommonNameRuby (Synthetic - Flame Fusion)SpeciesCorundumVarietyFlame-Fusion Synthetic RubyColorsSlightly Orangy Red, Strong Red, Slightly Purplish RedAlternateNamesLab Created RubyGemstoneGroupsKeySeparationsrefractive index, birefringence, pleochroism, magnification with immersion and spectrumClassificationCommentsFlame fusion ruby might show poor polish and they are typically cut to calibrated sizes and with be symmetrical.
Ruby-synthetic-flame-fusion chemistry & crystallographyChemicalNamealuminum oxideChemicalFormulaAl2O3Synthesisflame fusionCrystalSystemTrigonalChemistryClassificationOxideNatureSyntheticCrystallinityCrystallineChemistryComments
Ruby-synthetic-flame-fusion optical propertiesTransparencyTransparent - OpaqueDispersionStrength: moderate fire Value: 0.018OpticalCommentsRefractiveIndex1.762-1.77
Tolerance:(+0.009/-0.005)Birefringence0.008-0.01OpticCharacterUniaxialOpticSignNegativePolariscopeReactionDoubly Refractive (DR)FluorescenceSWUV: strong red
LWUV: moderate to strong redCCFReactionPleochroismDichroic, moderate to strong orangy red and purplish red
Ruby-synthetic-flame-fusion characteristic physical propertiesHardness9CharacteristicCommentsStreakWhiteSpecificGravity3.95-4.1 Typical:4ToughnessExcellentInclusionsStones may display face up pleochroism, curved striae that crosses facet junctions and strings of gas bubbles that might be mistaken for needles. It might be possible to see Plato lines or twinning planes under magnification and immersion with polarized light. Sometimes heated with borax to created fingerprint like inclusions to mask curved striae.LusterSubAdamantineStabilityVery GoodFractureConchoidalCleavageNone