Citrine: The Complete Guide
Citrine is yellow quartz — and in the hands of a knowledgeable jewellery professional, it is one of the most commercially versatile gems in the showcase. Available in large sizes that would cost a fortune in sapphire or topaz, in a range of warm yellows and oranges that suit a wide range of skin tones, at price points accessible to a broad client base, citrine is a workhorse gem that rewards the professional who understands and sells it well. It is also one of the most commonly misrepresented gems in retail: much of what is sold as topaz is actually citrine.
Citrine the Mineral
Citrine is the yellow to orange-yellow variety of quartz (SiO2). Its colour is caused by iron impurities (Fe3+) creating colour centres within the quartz crystal structure. Natural citrine forms in hydrothermal veins and pegmatites where quartz grows in iron-bearing environments. However, the vast majority of commercial citrine is produced by heat-treating amethyst or smoky quartz: both transform to yellow or orange upon heating as the iron speciation changes. This treatment is universal in the trade, fully accepted, and generally considered permanent and stable.
Quartz has a Mohs hardness of 7, making citrine suitable for most jewellery applications including everyday rings when set carefully. No cleavage means it is tougher than many softer gems. Citrine is stable to light and most chemicals encountered in everyday wear, though prolonged exposure to strong heat or sunlight can fade colour in some specimens.
Citrine Varieties and Sources
Madeira Citrine
The most prized citrine is a deep orange-red variety historically called Madeira citrine (after the colour of Madeira wine). This rich, saturated orange-red is the rarest natural citrine colour and the most commercially valuable. Most commercial Madeira-coloured citrine is heat-treated amethyst from Brazilian deposits in Rio Grande do Sul.
Palmeira and Golden Citrine
Palmeira citrine is a vivid orange variety named after a Brazilian locality. Golden or yellow citrine covers the full range from pale yellow to rich golden tones. Brazilian material dominates commercial production; Bolivia, Uruguay, and Zambia also produce amethyst that is converted to citrine.
Natural Citrine
Natural citrine (not heat-treated from amethyst) tends to be paler yellow and is found in Spain, the Democratic Republic of Congo, and some US localities. Its natural origin commands a premium among collectors, though it is rarely distinguished from treated material in mainstream retail. The Palmeira area of Brazil and some Bolivian deposits produce limited natural orange citrine.
Ametrine: The Natural Blend
Ametrine is a bicolour quartz showing both purple amethyst and yellow citrine zones in the same crystal. It occurs naturally only in the Anahi mine in Bolivia, where specific geological conditions produced zoned crystals with both colour types. Ametrine is a genuinely unusual and attractive gem that cuts well in large rectangular or scissor-cut shapes showing both colours simultaneously.
Addressing the Topaz Confusion
One of the most common misrepresentations in jewellery retail is selling citrine as “topaz.” The terms “golden topaz,” “Spanish topaz,” “Brazilian topaz,” and similar names have historically been applied to citrine, creating consumer confusion. The FTC guidelines require accurate gem identification; selling citrine as topaz is technically non-compliant with disclosure requirements. Every professional should use “citrine” for quartz and reserve “topaz” for the actual mineral.
