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Chrome Tourmaline is a rare and beautiful gemstone treasured for its striking green color. As a variety of Tourmaline, Chrome Tourmaline gets its name from the rich chromium element that gives it a vivid green "chrome" color.
What Makes Chrome Tourmaline Special
Chrome tourmaline has vibrant green hues that range from dark forest green to almost neon lime green. It has high clarity, with very few inclusions or blemishes.
The hardness of chrome tourmaline is 7 to 7.5 on the Mohs scale, making it durable and suitable for jewelry. That is why our jewelry shop vividcarat.com has a wide range of jewelry with chrome tourmaline.
This type of gemstone is also rare, as it is only found in limited supplies and mainly in Tanzania.
Chrome Tourmaline owes its coveted green shades to traces of chromium found in its composition. The intensity of the green depends on the chromium concentration.
Key factors in assessing Chrome Tourmaline quality:
- Color- Vivid saturation is most valued. Dark tones are preferred to light.
- Clarity- High clarity rate with few inclusions. Minor flaws are accepted.
- Cut- Well-proportioned cutting to maximize color.
Chrome Tourmaline Value
As a scarce gem, Chrome Tourmaline demands high prices, especially for fine specimens:
- 1-carat, VS clarity: $1,500 to $4,000 per carat
- 3-carat, VVS clarity: $5,000 to $10,000 per carat
Superior quality and sizable Chrome Tourmalines over 5 carats can fetch up to $20,000 per carat at auction.
Color Palette of Chrome Tourmaline
The spectacular green color is what makes Chrome Tourmaline so prized. However, not all greens are equal when it comes to beauty and value.
Color Range
Chrome Tourmaline comes in an array of rich greens:
Emerald Green – A deep, vibrant green reminiscent of fine emeralds. This is the most rare and expensive color.
Forest Green – A darker olive green with some brown undertones. This color is common and has a lower cost.
Lime Green – A vibrant yellowish green with medium saturation. This color values over very light shades.
Greenish Blue – A teal blue-green mixture with interesting secondary tones that add uniqueness.
The exact green depends on the chromium concentration present. Higher chromium leads to more intense greens.
Pricing per Carat
Prices for tourmaline in New York City fluctuate based on color saturation, tone, and depth of shade:
- Vivid Emerald Green: $5,000 per carat
- Medium Forest Green: $3,000 per carat
- Pale Yellowish Green: $1,000 per carat
Clarity, cut quality, and carat size also impacts overall value.
Size Premiums
|
Carat Weight |
Price Range |
|
0.5 carat |
$1,500 – $2,000 |
|
1 carat |
$3,000 – $5,000 |
|
3 carat |
$9,000 – $15,000 |
Rarer over 5 carat Chrome Tourmalines can command premiums over $20,000 per carat.
Chemical and Physical Properties
What makes Chrome Tourmaline so mesmerizing from a scientific perspective? Its alluring color and optical effects stem from its specialized chemical makeup and physics.
Chemical Composition
Chrome Tourmaline is a complex silicate mineral that crystallizes in the trigonal system. Its core chemical formula consists of:
- Aluminum
- Boron
- Silicon
- Oxygen
Traces of chromium and magnesium are also present, providing the green coloration.
Key Physical Properties
- Hardness – 7 to 7.5 on the Mohs scale. This stone is durable and suitable for jewelry making.
- Density – 3.06 to 3.1 g/cm³. Chrome tourmaline has a higher density than quartz.
- Crystal Structure – Prismatic and columnar crystals with a hexagonal shape. The crystal structure causes light dispersion and gives the stone a sparkle.
- Refractive Index – 1.61 to 1.66, which causes light to be dispersed and creates a sparkle effect. Pleochroism – Green to bluish-green pleochroism is visible in the stone.
Optical Effects
Combined with its strong color saturation, Chrome Tourmaline has excellent optical properties.
- A high refractive index produces a brighter-than-diamond radiance.
- Pleochroism creates alluring dual-toned greens depending on orientation.
Chrome Tourmaline owes its visual appeal to specialized optical physics working in tandem with rare chromium-infused chemical composition. This sets it apart from commonplace clear Tourmaline.
Enhancements of Chrome Tourmaline
Like many precious gemstones, Chrome Tourmalines are sometimes treated to improve color and clarity.
Knowing about common treatments and how to verify genuine stones is key for buyers.
Treatments
Heat treatment can modify Chrome Tourmaline color in several ways:
- Deepen green intensity
- Shift tone from bluish-green to pure green
- Improve color uniformity
Treated stones remain beautiful and look good in jewelry items but natural unenhanced tourmalines have far higher value and are preferable for investments. Our jewelry store (vividcarat.com) offers either treated or untreated tourmalines We provide full assistance and fair data about the chemical properties of loose gemstones and gems encrusted in jewelry. We work in New York City. Browse our website to see a wide section of gemstones available in stock.
Identifying Untreated Stones
Signs of untreated Chrome Tourmaline include:
- Distinct crystal inclusions
- Minor flaws
- Natural variations in hue and tone
Gem Certification When Purchasing Tourmalines in New York City
Reputable gem labs provide quality assurance through scientific analysis and detailed reporting. Certificates confirm vital details:
- Natural or treated
- Geographic origin
- Precision cut grades
- Clarity enhancement
Certified Chrome Tourmalines command premium pricing per carat and inspire buyer confidence. Leading global certification labs include GIA, AGS, and GCAL.
Insist on untreated transparent origin for investment pieces, and certified appraisal reports for validating market value factors.